you shouldn't worry about how much money they pay per 1000 impressions, but how many impressions they count. Shaving sponsors,ops i mean exit sponsors are not good in maths and don't count good. Actually they don't count good at all. hehe If offshoreclicks AND any other exit sponsor counted the real number of exit pages i wouldn't worry for signups any more

Expect to have 30% or less of your impressions counted with any exit sponsor.