Another idea that I hope will help you get more revenue for this great game.
Right now the player order is basically random (except the higher ranked players seem to go later).
What if you sold coins that players can bid to for player order? That could guarantee you a steady income stream that you can use to enhance this game. It would also help weak players get a small advantage over the stronger players (kinda like youngest player goes first).
Going first provides a very small advantage that good players would be able to overcome. I don't think anyone would mind if other players with deeper pockets paid for that advantage, as a way to support the developers.
I hope you continue to improve this game and I would definitely support you if you make this game better.