There was a thread about this in the iGlobalmedia section BB1. Its cross marketing and not an uncommon practice. Satya stated you could opt out of this exit pop for your players if you wanted.
It would be preferable if the exit was coded for the affiliate who originally refered the player, but I dont think they have this built in to their system.
We might want to let him know we would all value that function.
Heres the thread:
http://www.casinoaffiliateprograms.com/bb/showthread.php?t=5232