Some of you have noticed over the past several months that the only new games on JenKat were trials from BigFishGames.
I found out that as of today, all existing games that are not from BigFishGames as well as new ones (same proviso - non BigFishGames) will be the ad-supported free games from iWin.
From what I can tell, the iWin games require the iWin game manager to be running when you play the game. At least with Big Fish, the manager is required for download/install but it is not required for running the game. You just have a limit of 1 hour to play.
They will be developing their own games with one due out this summer so we do have that to look forward to.