This is a very good question. I've been on answeree for over a month now. This means i've been on the site since the rule on ost per day was adjusted to 5 in a day, then later 7 in a day in order for new and existing members to be able to meet the cash out threshold by December 22. But believe me, am really not sure of the actual reset time for posts per day.
At some point, i thought it was the usual 24 hour routine when like other sites, which automatically reset by 12am, but I later realized i was wrong.
But recently i came to an underatanding. I think the actual reset time might have to do with your number of post within 24 hours. If you're able to make 7 post withing 24 hours, the eight post would be declined. You'd get a "too many answers received, please try again in 24hours, meanwhile you can reply", something like that.
What am saying is, there's no general time for a reset. It all has to do with your individual number of post within 24hours. Then you'll have to wait for the 25th hour or longer to continue on the posts.