“Finished product” games make most their money at the beginning of their life then peter out into a long tail of revenue that drips in slowly day by day, until

“Finished product” games make most their money at the beginning of their life then peter out into a long tail of revenue that drips in slowly day by day, until it stops altogether or becomes negligible. This game dev has likely made as much as he will make from his game and it’s time to put it out to pasture and build a new game.