But, what for? there is no reward for mostly logged time. there is mostly cost also, User need also rent a VPS and If doesn't, PC should be online every day (electric cost).
Maybe it's not about rewards but longer login time can tell us a bit of information that users have more time in the forums than in the real world. But it's not impossible that one day someone will be willing to give a little gift to those who have a certain login time (real time not using tool like bot) to celebrate his birthday party like
Ratimov did before.