Although am still a newbie as regards making post frequently and earning merits from them, it is noteworthy to state that post which guarantee merits has to be excellent in presentation and punctuation.
If it has to be per excellence, then some posts that have received merits here shouldn't or ought not to, it's a thing if the giver's discretion based on what the reader must have drown out of the post which might not be same to other's perspective. I have come seen some thread of good punctuation and presentation but yet no quality in the message in claim to posses. Like someone said, merit is just an incentive for a job well done and not per excellence.