Posting Limit

New members are limited in number of posts per day - this is an anti-Spammer tactic.

The frequency limit is frequency" limit - 30 seconds in between posts and as you level up this restriction will be eased.

We are other users so we would not be able to know Apple's limitations exactly, but we do know that there are limits in the beginning to limit spammers. The limit does disappear, but when and how exactly we do not know.

Apple throttles the rate of postings from the newest members posting here in the communities.

This to reduce the volume of spam from newly-created logins. There have been messes in past years.

Yes, the posting limit is relaxed as the user increases in levels.

At one point in the past, it was thirty seconds between replies minimally, for users prior to level 2 or so.

AFAIK, these details are not documented anywhere, can vary, and are subject to change.