Hi everyone, I'm still playing arround with fb ads and learning everyday. For the last 2 days my problem is FaceBook oCPM. So here is exactly what I've done. 1. After testing I picked a nice ad for a CPA offer with great CTR and 25%+ conversion rate. 2. When I run my ad on FaceBook for the first 4-5 hours I'm paying under $0,40 oCPM (so I pay almost $0,01 per click and I get 1000+% ROI). 3. After 4-5 hours my oCPM starts to increase fast and can get to $0,80-$1 within an hour or two and keeps rising. The problem is that oCPM increases for no reason (my CTR is steady and when I choose CPM the maximum suggested bid is $0,14 - $0,29). My campaign is still profitable but I don't understand why do I have to pay more for no reason. Is there a way for me to keep my $0,40 oCPM? Thank you.