With the numbers that you’re talking about then I think you have to stick with a network that’s been around for donkey’s years and will still be here when it comes to pay you. You’ve already worked that out for yourself.
Much as I like the dudes and dudettes at Rushmore et al, I think for your own peace of mind you’re left with the choice of Casino Rewards and Casino Coins, in that order.
Personally, I make more money with different networks but then again, I’m not about to risk a million dollars in promoting them. If I was, then I’d put it into a group that I know isn’t going to fold anytime soon.
The more I think about it, the more I lean towards Casino Rewards. I would, however, consider carefully which of their two payment plans is best for you. Try to negotiate a % profit-share with them.