Investment at yolodice has begun recently, it is much better right now this way, maybe they are waiting for it to get bigger for a while before they need some more money. You have to realize if a casino has enough bankroll to cover it themselves, they do not really need to ask for money from you, they could make a lot more money just by themselves if they can cover it, hence why I think eth is not listed right now, and I think why they would probably want to remove all of them if they had the bankroll for it.

But when you do not provide a huge amount of max win, you start to accept investments which allows casino to have zero risk, if someone wins it costs investors money, and if someone loses it earns investors more but the casino earns a bit anyway.