It just came to my notice last week that Default Trust accounts too are sold here and may be escrow accounts too. This account sales happen privately and with the result nobody knows who is the new owner of the account and such accounts deserve a negative trust to prove that they are sold but nobody cares. I sometimes wish that Signature Campaigns are banned so that account sales will reduce in number.
I doubt it would make that much of a difference to account sales. In fact I and others think it would only increase scamming if signature campaigns were banned. Account values would plummet and people would then be able to buy high ranked accounts very cheaply and would do so just to scam unfortunately. Imagine all the accounts that would come on to the market from the people who are only really here because it's profitable. A small percentage of them will probably just try to scam a little money out of their account before they abandon it too.