A heads-up to all that I and Alanyeti have both recently experienced a major glitch in the WGT invite process. I have appeared green on his board when I have been completely offline. When I've come online, he's appeared offline to me although he's been available - and neither of us have been able to invite the other to a game.
Maybe worth bearing this in mind if and when opponents don't respond. Maybe useful to message them on their profile message board if an unresponded to invite has been sent.
Hope this gets allowed to be posted!!
David