First rule is that you cannot buy someone's account or it's popularity or it's work.
There is no such rule in the forum. According to the forum rule, there is no problem to buy an account/trust/merit or something like that.
2) You cannot buy Merit either from someone's and that's cheating.
Anyone can buy merit but the community can tag negatively. Probably you have already exchanged merit proof on [urlhttps://bitcointalk.org/index.php?topic=5429955.msg61481755#msg61481755]this post[/url].
3) you cannot make multiple accounts
It is obviously wrong. You can create thousands or more accounts. Many reputed users have multiple accounts eg: darkstar, loyecev, and many more.
4) You cannot come here to Scam people
It is not a written rule on this forum but it is not ethical and anyone can tag if their is any scam activity.