We do revenue share whenever possible preferring to take a long view strategy. For casinos and sportsbooks revenue share is definitely the right choice. The instance where you are catering to bonus chasers does provide a reason for thinking CPA, but the programs don’t generally like that sort of traffic on a CPA deal and will probably close your account anyway.
A case can be made for CPA in poker. Poker Stars for instance only offers CPA, so we went with that, and we have made more promoting their site in the past 6 months than we have at a site like Full Tilt over the past 3 years.