Reddit Ads Case Study: How Scaling Reddit Max 2.2x Hurt Revenue Before Improving Advertising Efficiency by 60%

Introduction

Over the last five months, I've been documenting my experience with Reddit Max (RMax) and testing how far Reddit's automation can actually scale ecommerce performance.

This Reddit ads case study follows a global direct-to-consumer electronics brand advertising exclusively on Reddit. The goal was simple: determine whether Reddit Max could become a primary campaign type or whether it should be viewed as a supporting tool within a broader Reddit advertising strategy.

Initially, the results looked extremely promising.

Reddit Max consistently delivered lower CPMs, broader reach, and stronger engagement metrics than traditional community-targeted campaigns. Like many advertisers, I assumed that lower CPMs and more traffic would naturally lead to more sales.

The data proved otherwise.

After scaling Reddit Max to 220% of its previous budget, Shopify revenue declined, conversion rates dropped, and purchase efficiency deteriorated despite significant improvements in platform-level metrics. Only after reallocating budget back toward standard campaigns did overall business performance recover.

What followed became one of the most valuable lessons I've learned about Reddit advertising.

Reddit Max is not a replacement for community targeting. It is a force multiplier for community targeting.

If you provide strong signals, Reddit Max can help scale performance. If you provide weak signals, Reddit Max can scale inefficiency just as quickly.

This Reddit ads case study breaks down exactly what happened, how Reddit's reporting differed from Shopify's data, and the Reddit ads best practices I would recommend to advertisers considering Reddit Max today.

Campaign Structure

The account consisted of three campaigns:

Campaign	Audience
Standard Campaign	Cold audience community targeting
Standard Campaign	Website visitor remarketing
Reddit Max	Community-signal-based expansion campaign

All campaigns were optimized toward conversions.

The account utilized Reddit's Conversion API throughout the entire test period and attribution was measured using a 7-day click and 1-day view window.

One important detail is that Reddit Max wasn't operating independently. It relied on community signals that had already been validated through months of testing. We knew which communities generated qualified traffic and which audiences consistently converted.

This detail becomes extremely important later because it highlights one of the biggest misconceptions about Reddit Max.

Automation doesn't replace audience research.

Automation amplifies audience research.

Why We Scaled Reddit Max 2.2x

At the conclusion of previous testing phases, Reddit Max appeared to be outperforming expectations.

CPMs were significantly lower than standard campaigns and traffic volume continued increasing. Since Reddit Max could generate more impressions for the same budget, the natural assumption was that increasing spend would create more opportunities for conversions.

The decision was made to move budget away from awareness initiatives and scale Reddit Max to approximately 220% of its previous budget level.

The logic was straightforward.

If Reddit Max generated cheaper impressions and more reach, it should generate more traffic and ultimately more sales.

From a media buying perspective, the theory made sense.

The results told a very different story.

What Happened After Increasing Reddit Max Budget

Reddit Max Performance

Comparing May 3rd through May 27th against the previous period:

Reddit Max	Change
CPM	-41.94%
CPC	-0.23%
CTR	+15.62%
CPA (View Content)	+41.58%
CPA (Add To Cart)	+111.85%
CPA (Purchase)	+101.68%

At first glance, these results looked attractive.

CPMs fell dramatically.

CTR increased.

Traffic volume expanded.

Many advertisers would stop their analysis right here and conclude the campaign was successful.

That would have been a mistake.

Standard Campaign Performance

Standard Campaign	Change
CPM	+1.55%
CPC	-3.27%
CTR	+4.98%
CPA (View Content)	+51.60%
CPA (Add To Cart)	+39.70%
CPA (Purchase)	+72.40%

Performance across the account suggested something larger was happening.

Users were interacting with ads, but they weren't progressing through the buying journey at the same rate.

Shopify Performance

This is where things became interesting.

Shopify	Change
Sessions	+26%
Revenue Per Day	-29%
Conversion Rate	-42%
Average Order Value	-10%

Traffic increased by 26%.

Revenue decreased by 29%.

Conversion rate dropped by 42%.

This was the moment where the story changed.

The problem wasn't traffic volume.

The problem was traffic quality.

The Biggest Lesson: Cheaper Traffic Does Not Mean Better Traffic

One of the most important Reddit ads best practices is understanding the difference between engagement and purchase intent.

Reddit Max became very efficient at finding people willing to click.

What it struggled with was finding people willing to buy.

The lower CPMs created a false sense of confidence.

The higher CTRs created a false sense of momentum.

Meanwhile Shopify showed that the quality of incoming visitors was deteriorating.

This is a mistake many advertisers make when scaling campaigns.

They become focused on CPM reductions and traffic growth while ignoring what actually matters: revenue and conversion quality.

Our Shopify data suggested Reddit Max was successfully expanding beyond the proven core audience.

Unfortunately, that broader audience wasn't converting efficiently.

What We Changed

At the end of May, we decided to rebalance the account.

Instead of continuing to push Reddit Max aggressively, we reduced Reddit Max spend and reallocated budget back toward standard campaigns.

More specifically:

• Reddit Max budget was reduced

• Budget was shifted back into awareness initiatives

• Community-targeted campaigns regained priority

• Reddit Max continued operating as a supporting campaign

This change produced an immediate shift in performance.

The Recovery Phase

Comparing May 28th through June 7th against May 3rd through May 27th:

Reddit Max Performance

Reddit Max	Change
CPM	+26.16%
CPC	+95.49%
CTR	-35.47%
CPA (View Content)	-54.54%
CPA (Add To Cart)	-65.34%
CPA (Purchase)	-73.46%

At first glance, these metrics actually look worse.

CPMs increased.

CPCs increased.

CTR declined.

Yet the quality of traffic improved significantly.

Standard Campaign Performance

Standard Campaign	Change
CPM	+13.77%
CPC	+2.79%
CTR	+10.67%
CPA (View Content)	+103.42%
CPA (Add To Cart)	+228.97%
CPA (Purchase)	+306.66%

Again, platform reporting only tells part of the story.

Shopify Performance

Shopify	Change
Sessions	-33.12%
Revenue Per Day	+30.5%
Conversion Rate	+79%
Average Order Value	+12%

This is arguably the most important table in the entire Reddit ads case study.

Traffic declined by more than 33%.

Revenue increased by over 30%.

Conversion rate increased by 79%.

The account generated significantly more revenue from fewer visitors.

That is what quality traffic looks like.

Why Shopify Told A Different Story Than Reddit

One of the biggest challenges facing advertisers in 2026 is attribution.

Even with Conversion API enabled, Reddit user journeys are rarely simple.

Users discover products.

They browse.

They research.

They revisit.

They purchase days later.

As a result, platform reporting often struggles to capture the full customer journey.

During the recovery phase, Reddit's dashboard showed total purchase CPA improving by approximately 12%.

That was encouraging.

However, Shopify showed something much more significant.

Daily revenue increased by 30.5% while average daily ad spend declined from approximately $265 per day to roughly $215 per day.

Directionally, this suggests advertising efficiency improved by approximately 60%.

The exact number isn't the point.

The lesson is.

Always evaluate Reddit Ads against backend business metrics rather than relying exclusively on platform attribution.

What I Got Wrong About Reddit Max

When I started this experiment, I believed Reddit Max had the potential to become a primary campaign type.

Five months later, I view it differently.

Reddit Max is powerful.

Reddit Max can scale.

Reddit Max can absolutely improve performance.

But Reddit Max performs best when it's built on top of proven audience signals.

Without validated communities, Reddit Max simply has more opportunities to scale bad decisions.

With validated communities, Reddit Max has more opportunities to scale good decisions.

That distinction changed how I think about the platform.

Reddit Ads Best Practices From This Experiment

Validate Communities First

Before considering Reddit Max, identify which communities generate qualified traffic and conversions.

Use Standard Campaigns Before Reddit Max

Reddit Max performs best when it learns from proven signals rather than assumptions.

Measure Revenue, Not Just CPM

Cheaper traffic isn't always better traffic.

Compare Platform Data Against Shopify

Platform attribution should support business decisions, not drive them.

Scale Slowly

Large budget increases can quickly expose audience quality problems.

Use Reddit Max As A Scaling Layer

Treat Reddit Max as an expansion mechanism rather than the foundation of the account.

When Should Advertisers Use Reddit Max?

Reddit Max is most effective when:

• Standard campaigns are already profitable

• Communities have been validated

• Creatives are proven

• Headlines are proven

• The account is ready to scale

For advertisers who have already established a strong foundation, Reddit Max can become a valuable growth tool.

When Should Advertisers Avoid Reddit Max?

Avoid Reddit Max when:

• You're launching a new account

• You haven't identified high-performing communities

• You lack conversion data

• You're guessing which signals to use

Poor inputs create poor outputs.

Reddit Max cannot compensate for weak audience research.

Recommended Budget Allocation

Based on this experiment, my preferred account structure is:

Campaign Type	Allocation
Standard Campaigns	80%
Reddit Max	20%

This approach allows advertisers to maintain strong performance from proven audiences while using Reddit Max to discover incremental opportunities.

Frequently Asked Questions

Is Reddit Max good for ecommerce?

Yes, but only when supported by validated audience signals and strong campaign fundamentals.

Can Reddit Max replace community targeting?

No. Community targeting should remain the foundation of most Reddit advertising strategies.

What budget split works best?

Based on this test, approximately 80% standard campaigns and 20% Reddit Max delivered the strongest balance.

Is Reddit Max suitable for smaller advertisers?

Yes, provided standard campaigns are already performing well and the advertiser understands where their audience spends time on Reddit.

Should advertisers trust Reddit attribution?

Advertisers should use Reddit attribution as one input, but always compare results against backend business data.

What's the biggest Reddit advertising mistake?

Optimizing for cheaper traffic instead of higher-quality traffic.

Conclusion

This Reddit ads case study changed how I think about automation on Reddit.

The experiment proved that lower CPMs, higher CTRs, and more traffic do not automatically create better business outcomes.

When Reddit Max was scaled aggressively, traffic increased while revenue declined.

When budget was rebalanced toward community-targeted campaigns, traffic declined while revenue increased.

The lesson isn't that Reddit Max doesn't work.

The lesson is that Reddit Max works best when it's built on top of proven audience insights.

After five months of testing, my conclusion is simple:

Reddit Max is not a replacement for community targeting. It is a force multiplier for community targeting.