There is a site which can (to date) get you better offer at certain US sites than TGT can do. It is:
The Spooky Express
The owner of that site has a log in here as "Spooky", we have contacted him to ask who he is and about his relationships with those sites, but he has not replied at all. Any/All feedback by TGT members to date, mainly in this thread:
Has all been positive though.
So it may well be the case that if you are going to join one of those sites you would do well to go and speak to "Spooky" first to get the most "Bang for your buck". However it is/he is in absolutely no way linked to or endorsed by TGT and if there is any problems at any time you need to speak to him we cant help.