I've noticed that if you have an ad already approved and running in your campaign and you go to 'create similar ad' and don't change the ad copy, the ad has an automatic approval. I'm not sure about the internal workings of the fb engine, but at first glance this looks like it could be a way to maximize your exposure & tracking. You can clone ads really fast and change the targeting to see which demographic performs best. I'm hoping that cloning and ad means you will get double the imps, but I doubt fb is that dumb. any thoughts?