If you want to play these, it's better to know that you will most likely not hit the biggest prizepool. On
pokerstars they say that the rake is 8%, but quite some money is in the top 3 prizepools (120x, 240x and 12000x), which all are quite unlikely to hit. The 120x and 240x might be possible to win, if you play 10 thousands of them, because it doesn't mean that if you spin one, you'll win one.
So instead of counting on the 8% rake, you better count with 9% (this excludes the top 3 prizepools).
This means that if you want to be profitable in the long run (to be able to compensate the high variance in these games), you'll need to win a little over 49 chips per game on average. So if you have an average chip EV per game of 50 or more, you should be able to beat these games, even if you never hit the top 3 prizepools.