I’ve optimized 25+ FB ad accounts, spent over $10m in ad spend and I”M STUMPED!

Just took on an e-commerce client whose account has me totally stumped. Looking for any ideas you've got. Here's what happened: They were spending around 15-20k daily on their ads and getting about a 3 ROAS. They turned off about 90% of their ads in the middle of April due to low inventory. Once they turned their ads back on about 2 weeks later their ROI got cut in half. I've seen things like this happen, but they almost always work themselves out with a little bit of time. They've tested…

I've optimized 25+ FB ad accounts, spent over $10m in ad spend and I"M STUMPED!