If a system like this were really going to promote better engagement, though, I think replies to (and quote posts of) your own posts would have to be excluded from your reserve. Otherwise, people would just build up their reserve by boosting people who've agreed with or said nice things about them. Those would need to be reserve-neutral.
Merveilles is a community project aimed at the establishment of new ways of speaking, seeing and organizing information — A culture that seeks augmentation through the arts of engineering and design. A warm welcome to any like-minded people who feel these ideals resonate with them.