That would be Greenthumbs's own private balcklist, only the webmaster of Greenthumbs would know why. I know who owns it, but I can't recall the name right now, maybe after morning coffee I will think of the name.
With TGP's it is often their script that has added you in and the webmaster owner doesn't even know about it.
I know with my own little TGP I have the script set to pull galleries that it finds a problem with, but I never have it also set to blacklist domains, but it does have that option.
I've found myself banned at many TPGs for no reason at all. I certainly know that I never cheat and do try to follow all the rules. Just another reason to be sure that you have other sources of traffic,, like link list.
It does seem like the domain that I use for TGPing gets burnt out after I use it for awhile so I'll usually get a new one every now and then. :confused: