merits difficult to obtain, many new people complain, the forum allows newcomers to increase the online duration such as 1 month to 1 merit, so that you can reduce the black market
No, it won't happen surely because it will go inversely with original purpose of merit system when Theymos (admin) launched it.
Allocating / rewarding merit points based on online duration is stupid idea. More online time doesn't mean those users are contributive ones. They are likely spend more time in the forum to spam their shitty posts, and again quantity will dominant quality.
Good members can still spend less amount of time, but can be much more constructive than spammers. It's the fact.
Conclusion, Theymos will never allocate merit points based on online duration of forum users. Never!