... It would be sustainable if coins for free hunters come from the game itself. ...
That is a brilliant idea. If one tenth or hundredth of the mining reward went to letting a brand new person play for free, and if there were a way to make sure no robots etc took those coins, it would be a massive draw.
there is a "game_fund". afaik, it holds a lot of coins. its supposed to be used for something in-game, but i dont really know how it will get used, or how it will get decided how it will get used. it would be great to use this fund to make the game more random and give back some coins to players on the board. is it possible?