How long before you bail on an ad creative?
I've been running 5 creatives in my campaign for almost a week, with 10 more ready to go. After the 4th day, I replaced the lowest converting ad and the highest cpc ad for two new ones. Now after a couple more days one of the new ones is getting the most conversions but VERY expensive. The others are sitting around 20-40 cents but now only getting a few conversions.
And to top it off, my best performing ad dropped like a stone when I added the two new ones and doesn't get any spend at all anymore.
Very confusing and frustrating.
What's the strategy for culling/replacing ads so meta keeps pushing the winners (i.e. most conversions and lowest cpc) and not have it sink money into the ones that aren't working or abandoning good performers altogether?