I don't see the problem. Raise the max block size limit and problem solved.

SDice is only sending so many txns because it's cheap. When it becomes expensive, they'll stop (or find some other creative way to do what they do). People will use the blockchain however they're allowed to. All you're saying is that you don't trust the design of bitcoin to handle this stuff and you want a centralized "solution" to something you don't like on the network.

Go use fiat.