Since I have started that goal, I have sent out 9 invites to people that requested them, and 6 of them were accepted.
I have not had to send any out lately. I guess one of two things is happening: either everyone that wants a Gmail account has one, or there are so many of us giving out invites that we, individually, do not get many of them at all. I would put my money on the second reason.
Cheers!
