Part of the problem is that it's all the same people participating in these games.

One thing that can help bring more new people in is to have whatever changes are necessary to make myetherwallet.com work for sending to contracts.

Once this is easier to do it will be possible for the masses to come and play these games.

The only people that can play right now are those willing to figure out how to setup geth and download the full blockchain. need to lower the barrier of entry.

Shapeshift being back online will help too.