So i was testing with their PPC program lately and yesterday i ran a campaign which took off to some point. My ctr was 0.13% ~ and i was getting a good conversion rate but then suddenly it all stopped, i mean literally the impressions went down to being stagnant and after a few hrs it started on its own again (i didnt monitor it then) and behold this new wave of traffic is shit it literally brought my CR from 23% to 15% the heck is going on? did fb got 'smart' and sent me lower grade traffic after they found out i am getting good clicks at low prices or is someone else bidding against me ? I doubt it is a competitor cos i am still getting clicks and my ctr on fb is maintained and went up abit but it's the conversion that is pulling me down. Anyone got experienced this before?