Hi ya,
I do remember discussing on someone else’s original topic, in particular about Grand Prive / Big Dollar in particular about cross marketing ..
http://www.casinoaffiliateprograms.com/bb/big-dollar-casino.13938.html?&highlight=cross-marketing
Not much extra info there (most of it already posted in this one).
I believe it’s fairest to:-
1. Give affiliate A the player originally visiting their first brand in the group via affiliate A’s tags.
2. Give affiliate B the same player visiting another brand in the group if referred by affiliate B.
3. Give affiliate A the same player visiting another brand in the group if it is via group marketing.
(agreeing with most/if not all posts above) 
Thanks for re-vitalising this post
I suspect we’ll not see any other affiliate programs post here unless they do it (i.e. I don’t suspect any will change – especially Grand Prive which I’m getting so tired of ‘listening, agreeing, then ignoring’ lol) …
Cheers all
Geno/CC