Not that I think it is a good idea, but
people may want to more quickly be able to play at the higher stakes, where the players may take the game a little more seriously. My experience playing the lowest fixed limit stakes on Play$ PokerStars was educational, but no one took it seriously. With regards to raising pre-flop, there was anywhere from a slight aversion to an outright derision. I was told by many players that raising pre-flop takes the fun out of the game and that it is poor strategy. I was frequently able to clear out the majority of a full-ring table, simply by raising. Everyone would get up and go to another table. As I moved up in stakes, the play actually got better, and the players complained less. The same was true for the SNGs. The cheapest ones cost the maximum amount of chips that can be acquired for free. In those, it was almost guaranteed that the table would be short-handed within fifteen minutes, because many players simply shove the first hand, lose, then go reload their account for free.As with the fixed limit tables, the play did get better, as I moved up in stakes.
There are also certain events that only people with a ton of chips can get into. There is a billion-chip something-or-another. Play$ chips are super cheap to buy. Maybe people simply enjoy the convenience of not having to wait an hour to reload, every time they bust.
It is the same reason that Candy Crush was so successful, except that it happens to be poker. Lastly, I don't know how often it happens, but there was a player who was able to satellite into the NBC Heads-up Poker Championship via a
wsop.com play$ event. With more chips, it could be easier to buy-in to such an event.