Casinos have been doing that for years and it really works, it works perfectly. Do people want more games to play? Sure they do. Do people like to deposit more type of coins? Sure they do.
I kind of disagree. New coins especially do not mean anything to me, I have never once used a new coin just because it is offered at my casino. I use Bitcoin, and then anything else is maybe exchanged through the platform or won from competitions. New games also, I think not really sustainable unless you hit on something so different like dice was when it first came on.
It is always about new competitions and contests against others that make people excited.
It doesn't contribute anything though players may have a options regarding on their deposits or withdrawals, They need a good marketing strategy by now since there are so many computation popping out which delivers a good service and being out dated can kill the business if they will just rely on the old system. Competitions are great option to create more excitement to play the game.