How many posts before embedded media limit is lifted?

Hello, I just joined here to share some projects and ask some technical questions.

I tried starting a build thread with lots of pictures (hosted elsewhere). When I hit create topic, it errored saying a new user cannot post a topic with more than one embedded media. How long is this rule in effect?

This page seems to do a better job explaining it than I can:

Some settings are slightly different on this site though, for instance, new users are allowed to post one attachment instead of zero.

Thanks, seems just posting and reading a few threads (while logged in) might have done it.

I will try posting again.