Hi Sara,
For my 2 cents, I’d say first off that for me personally, the integrity and reputation of a casino is more important to me promoting it than affiliate incentives. A casino with a good player reputation, speedy payouts and good suuport is more liable to retain players which is the key, for me anyway. If i see a casino not treating a player properly, then i tend to shy away from carrying it, as i believe all affiliates have a moral obligation to do so – and I’m not suggesting you guys fall into that category, just stating the way i work.
That said, regarding affiliate incentives, most of those i see from programs tend to reward webmasters who send a minimum level of traffic and this is a turn off as it means you could spend time and effort promoting a casino and never reach the qualifying threshold, particularly if like me you are relatively new to the game (6 months in my case).
Nothing concrete there i know, but an opinion at least 
Cheers
Simmo!