I know this is not exactly what you are asking about, however I was with both programs, but haven’t received any invitations. So I haven’t joined GT Bets.
I have always been paid by VIPProfits, even though it could take months and quite a few emails. Now, they seem to have closed down for good.
I would definately think twice, three times etc. etc before joining GT Bets, without even knowing anything about them right now.