To be honest, usually I would say that he didn't violate anything because on this forum there are no restrictions on selling or buying accounts. But your statement made me change my mind, it's really unfair if new people immediately have legendary rank status and don't feel what it's like to fight from the bottom. It really hurts, and yes maybe from now I will agree with redtrust for buying and selling accounts
For a long time, people would buy established accounts for the sake of promoting a new coin or token - which were often scams - to make it looks like reputable members of the forum were endorsing them. Nowadays people buy these accounts mainly for the purpose of enrolling in a signature campaign. They take the earnings they have made from sig campaigns and re-invest them in the purchase of a second, third, fourth or fifth account. So I highly doubt this member is at all "new." They probably have multiple accounts currently enrolled in campaigns.