Why don't I get more than 291 trohy points insted of more for all the games I won?

Due to their lack of communication in terms of no TOS or Rules of the game otherwise, I learned this a bit myself that after you get the max number of trophies at each stage then that is all you get. So depending how much coin you have and can get which determines what you can play again. So be wise like me and stick to Stage 4 or lower for chances to gain while waiting for chests to unlock and to get enough to lay higher stages you have not yet completed or started getting trophies in to raise your count.