Forgive the basic nature of this question, but what is the best way to display CPA offers when you have an audience that is repeatedly coming to your page. In my case, I regularly draw users from Facebook and other sites to my page- but usually its the same set of people (a total pool of about 17K- with a few hundred coming each day). My problem is that if someone comes to the page, but has already completed that offer (ie: a free survey), then if they come back another day and the same offer is displayed, I lose out since they can't/won't want to do it again. Is there a way of setting up a rotation such that in the event the user has completed an action on an offer, a different offer is showed to them. Separately, would you recommend I just regularly rotate different offers daily? The problem I had with this is if one offer is working really well, I would have to sub it out completely simply because on one day a few hundred used it. Thanks!!