I think Johnathan resolved this very nicely.
Referback also has something called a “claw back CPA”.
This is a CPA that grows with the deposits.
$50 when the first $50 is deposited, $50 when the second $50 is deposited, and once again when the 3rd deposit happens.
This makes sense for both the affiliate and the manager.
I still don’t like CPA. If I had gone CPA I would have lost a lot of money over time.