As far as I understand it - and please check with CCBill Support on this - if a site does not embed your code but hosts the galleries then that website would need to encode the gals for you to get credit. This is if the Sponser is hosting the galleries. But if you just want to download the galleries you can then insert your own code.
I hope that helps and I hope I'm right about that. LOL I know with Porn Nerd Cash we generate the code for you once you are signed in.
Good luck!!