Im pretty sure Skincash (Mr Skin) did that change a while back - although they were using ibill as well as ccbill - I dont think that would skew it too much
Flashcash changed over a while back - although they were using their own backend if memory serves
Phatchecks - converted about 2 years ago
Realitycash (adult.com) changed from something else to nats
OcCash swapped from ccbill a while ago
pornstardollars swapped over although they didnt use the ccbill affiliate backend
jaymans program swapped over ravenriley if I remember correctly?
and of course it would be hard to check anything with this one - stiffycash over to mayors money with the implementation of nats