Why some offers just don't credit.

Advertising networks are obviously middle men for advertisers who want to have their products viewed or tested. Advertisers set "caps" for how many offers completed they are willing to pay for. Not all offers are capped I assume it depends on what advertiser and what offer. When this cap is reached and I believe it goes by month networks will either make an offer expire or place it on hold. Realize they deal with alot of publishers daily and are not always great about notifying a publisher of offers that are "capped" or on hold/expired. So in the networks defense they do the best possible to notify publishers(site owners) Remember this when your fussing about one of your offers not approving.