I heard about this on MLB radio (it's also one of the ads on this forum site). I signed up for a 10 buck paypal deposit and played for the first time last night. I gotta warn you all it's tough! Competing against 1100 other 9 man lineups I finished 200th.
I had 2 grand slams in my lineup (Mesoroco and De Aza) two home runs (Holliday and David Wright) I had one of the best Sp of the night in Homer Bailey. I only missed on Votto, Tyler Greene and Rafael Furcal.
It cost $2 to enter. First place paid $300. 110th place paid $6.
Fun, but tough to win obviously. Likely not a good investment. I felt I did really well and no payback for it.