I haven't received the payment as well.
Right after the so-called IPO ended, he locked the threads, and blocked PMs.
His site gamblex.org becomes a blank page, so as his facebook and twitter.
So, I guess it is pretty obvious what happened.
As I have posted in that thread (
https://bitcointalk.org/index.php?topic=553094.0), I guess Gamblex has gone right after the so-called IPO ended and will never come back...