...Since it's difficult because of a lack of quality and meritworthy posts, his sMerit count keeps increasing and is not being emptied.
The only problem is not lack of quality and merit worthy posts. Amidst low quality posts, there are still posts which cross the average benchmark that ought to receive merits. The problem could be that most of our merit sources have high standards for giving out merits and it's rare for their standards to be met by an average forum user.