Account sells is dislike by most of DT community, there is no business with rules. Feel free to ask admin why you got tag for buy account.
Damn straight account sales are frowned upon here--and man, I bet you that guy paid a lot of money for that account, given that it was registered in 2010. That's an old school account, and I'm pretty sure there's usually a premium for those.
He already got tagged by multiple members, but I may also add a feedback due to the changing DT membership--though I think DT1 members basically slip down to DT2 anyway, so it may not matter much.
I'm not shocked in the least that there's some cheating going on in the cryptotalk.org campaign, since it has basically attracted members from the same filthy pools that usually flock to altcoin- or token-paying bounties, and cheating is rampant in those. Bust 'em all back to hell if you can, guys.