Judging by retention (just the effort doesn’t do it, it has to work too) I would say Casino Rewards and Referback.
Thanks Dom, I just started marketing CasinoRewards this past week (new stats motivated me) and I’m picking up some registrations, no deposits yet, but good to hear they follow up.
Some I tested as a player and never receive an email.
Your right too, once a player deposits they need a reason to stay! another good one for retention is Blasters.
dalster44