I agree.
It can create a criminal element as it has in poker.
IF it works, it can get other affiliates to compete with you, lowering earnings further and further. Then you will need large numbers of players to make any money at all, so you will try to poach them from wherever you can, offering rewards if they open duplicate accounts with casinos and bingos.
This hurts the casinos and bingos, it hurts other affiliates, and it is theft.
This scenario has played out in rakeback and I too would hate to see this expand into other areas.
I see the most notorious rake back program being one of your largest sponsors already.