If you're thinking about Return to Player (RTP), there is no such thing for the online casino itself. RTP only exists on individual casino games. You could argue that one casino is more profitable than another based on the loyalty club rewards or the bonuses it offers. Depending on the conditions attached, this could be advantageous while trying to win or give you free cash outright.
It doesn't mean you should choose the casino with the biggest welcome bonus but the one with the most advantageous wagering conditions. Check out our collection of the best online casinos for some exclusive offers.