We spend lots of money on ads that do not convert for us and our own cookies are overwritten by affiliates that benefit from our advertising efforts in brand recognition when they click in from an affiliate's website and that referral makes a purchase.
We give that spending to the affiliates benefit as well as our own. Sword cuts both ways usually.
The only way to ensure that you benefit from a conversion is to get a free signup on most cam sites that pay lifetime.
However, I don't allow our models to override cookies from our camsite -- that is not fair to me or our affiliates