The July 15 Transformer just completed Round 1. They had 461 winners in Round 1 for a pot that 790 people contributed to. That's a 58.35% win rate, slightly higher than average for Round 1, but not too far off the mark. Winners got $16.10 each.
(Note: I write posts about the stats for all the games that are running, not just the ones I'm playing in, but my posts only appear in the feeds for my games. If you are in other games, feel free to post my blog there so people can see how they are doing. I'm currently in the Mar 4, June 3, and Aug 12 games. If you add me as a friend, you will get a notification about all the stats posts I make).