Thats whack man.. If I recall Dave was told he could NOT be a vendor when he asked and submitted to be a vendor.. He then yes kept emailing and pm'ing people about his parts for sale. He never did anyone wrong though. I among others don't know why he was never granted vendor status.
As for RX7club.. his demise was after internetbrands showed up. then he got in deep water about how they wanted to charge him 800.00 A MONTH to be a vendor there.. he declined and sold a few USED parts that he owned and was banned for selling in general..
I think his has just been the outspoken one and people don't like him much.. So its easy to pick on him and ban him when he does something that really is not that big of a deal.
As for TMF.. he was banned because of bad blood between him and a moderator.. he was a vendor on there it had nothing to do with selling.
If anyone is interested this build is still going on and still being documented, however I don't want to get in trouble so I wont post the link to where it is..