The play to earn model is literally a ponzi scheme with a fancier name. The money you earn has to come from somewhere. It doesn't appear out of thin air. In 100% of P2E games, the earliest players get paid by the revenue from later players. Eventually, the game stops growing, so the later players are left holding the bag.

Obviously, some people make a lot of money in ponzi schemes (most notably, the people that start the ponzi scheme in the first place), but it's a terrible design for people that aren't the ponzi creators or the first adopters lucky enough to get in on the ground floor.