One every ten minutes? Wow. Total mood killer. The main reason I don't think a time limit on posting would work is that there are some subs with only 1 or 2 people actively posting, with others just commenting. I only get an hour or so free time with my current schedule, so I'd rather post a bunch in that hour, and check on it the next day. Not all people are that busy though, so perhaps it would work well.