We scaled ad spend on our ecommerce store… and performance dropped

Recently worked on a brand where campaigns were performing well at a comfortable spend level. Naturally, we scaled budgets quickly.

Revenue increased, but efficiency dropped faster than expected. CPA climbed, blended ROAS dipped, and suddenly the numbers didn’t feel as strong.

It made me realize scaling doesn’t just mean “add more budget.” It exposes weak spots in the funnel, landing page clarity, offer strength, even post-purchase experience.

What usually breaks first when you scale?

Creative fatigue? Funnel issues? Audience quality?