I think the daily limit is around 15 posts.
Is that right?

What confuses me is when they reset, because it doesn't seem to happen all at once for me.
It's almost like, if I made a post at 5pm it'll count towards my limit until 5pm the next day. When I hit my post limit it feels like I'm waiting for my next post to time out before I can make one more and it sucks.