Sirius, I am sorry but to lable something “potentially fraudulent” is a little out there – if you have an account where a player was denied a bonus who had full rights to it please send me an account and I will personally investigate it.
Where we have seen players denied has been on the occasion where someone opens a duplicate account and they forgot they had one once before – but this as you said before is standard practice.
If this has affected your business please let me see where – till then I will maintain that this is in place to protect the casino, and therefore by default also affiliate income, against abuse and will be enforced in that capacity only.