Yes, this method of knocking money out of the clients of gaming clubs on the Internet has long been used by greedy liars. I already fell into this trap about two years ago, but it's good that I didn't pay anything. I left my virtual winnings and tried not to think about it anymore, although the desire to pay was very great!
It takes a very undeveloped brain for someone to reach the rationale of:
"I can receive 1 that I am owed, if I send .6 before being compensated what I am owed"
I have noticed the scammers aren't changing their posting format or anything; most of the new threads that are copies of this same scam, are being locked/deleted quickly; but i am sure to negative trust and report the users anyways just because.