IMO he is doing it because if they “do” him it will set a presedent to chase down the likes of Pokerstars, Fulltilt, etc etc – He is worth billions so I am sure he will do minimum time and the potential to knock out the guys who are taking US poker players coupled with the fact that it could pave their way back in is worth a shed load to them.
Basically if he is proscecuted they will then have actual case they can base further procecutions on…..I could be wrong though…..He may just feel bad 