Hi, I just started our test ad campaign on Facebook targeting the US market on 3 different categories. 'Cute' pictures worked pretty well, and an appealing text with direct call-to-actions juste made my CTR way higher than the 'news' reports (0.04). Some-how it looks that the algorythm continuosly up-grade and increase traffic to those campaigns with higher CTR, caring less about factors such as MAX CPC. It also looked like the FB system tested the ads for couple of days at a max spend of 50USD(while the daily budget was set at 300USD), after wich he drove lots of traffic brining the spend from 50 to 280USD in 8hrs. Anyone has more experience or knows more about FB?