Perhaps many buy and sell merit points in secret, I think it is very difficult to get merit points, most people will probably take a shortcut, maybe they have multiple accounts to send each other..
there are people whose selling and buying points, if i will tell most seller will be legendary as they have the most number of smerit,
but thanks to the IDEA of theymos that every account can merit another account (one name-one account) have a limit of 50 merits per month.
If the admin really wants every post or most of it are quality, it should start with BOUNTY (signature campaign)
If a campaign manager will implement a 3-5 post a week that must be 500 letters (at least) and must be constructive and have high quality, i think spammer and low-quality post will be gone or less.