I think he is related to somebody who donates his merit. I do not think a simple comment can get 5 merits. Too confusing for this problem. I regularly participate in the Altcoin Discussion Forum. There are many quality posts and good reviews. But it does not seem to have much merit by those who have merit.
The issue of giving merit to someone seems to be an eternal story for the bitcointalk forum.
It may be that because if there is no propagation relationship between them, there will be no 5 merit in such post. Because there is a better post than aye post. They did not get the Merit but they were given 5 merit...very lol