I know you asked for a mod. But I know the answer, so, I'm gonna answer anyways. They give you a certain amount of comments for you to be able to comment, for a period of 24 hours. They "roll" It over to the next day as you said.
That'll be the Day ! I don't think they work like that ! I log off a while and come back and have only been nailed twice ! If I log off a couple hours and come back , it doesn't seem to bother me . I'd like to see a Mod answer this ! Good question !