I don't accept it. In my experience the ones who play such games are often the first ones who will run off not paying you or doing other things. You can't trust them.
Also here is probably a good place to mention this. I recently joined a lot of niche ccbill programs. I found a lot of the following:
1. Sites which have blatant traffic leaks which are uncredited to the affiliate. Common were clips4sale, aebn, as well as the webmaster's other sites of which are uncredited to the affiliate.
2. Programs which have rebills secretly set to zero so the affiliate will not get credit for any rebills on the 50% revshare program.
3. CCbill cookies set drastically under the default three day duration. Common was 24 hours. I even found one which was only a few hours.
4. Multiple processors on the join form (the affiliate only gets credit for ccbill joins)
5. One program even went ahead and set up their own ccbill ID on the warning page. In this way if your ccbill cookie gets set and the surfer comes back their own ccbill cookie will overwrite yours and they get the sale.
You need to watch yourself. Especially as revenue dries up. More sponsrs will be looking for ways to keep their profits up and some might just go to the dark side so to speak.