I've played 302 PS $15 turbos against 1996 unique players. One player has been in 7.3% of these games and another has been in 5.3% of these games. Two players have been in between 2% and 3% of these games. All other players have been in less than 2% of these games.

There's some statistical way to figure out how big the entire population of players from the number of repeat customers. At least there is in wildlife where populations are often determined by trapping and counting repeat visitors. The multi-table aspect of the poker problem may complicate things.