I just wondered about all of these CPA networks to see weather or not if they can be trusted in terms of tracking all of the traffic that one sends them.
For example, if one sends traffic for an email submission CPA promo and it eventually convert, then how sure are you that the CPA networks are going to reward you with that conversion?
I've tested with some of the email CPA promos and I've realised that some of them don't reward you. In fact, I was surprised after speaking with them that there may be that 'one-off' occassion where the system fails to track it.
Well, that didn't sound good to me so I've stopped doing email CPAs.