wow! ofcourse he leaves out alot of the information. why expect the book to play fair if you dont obey rules yourself ?
you do stuff like this with so big amount money... just why...

Simple, he thought he could get away with it.
If he won, he keeps the money if they let him withdraw it.
If he looses he comes and complains and he tries to get his money back.
Just another scammer trying to scam.
-Dave