Oh I'm comfortable not posting in the section until I make the minimum post count. I'm not particularly concerned about the 10 posts limitation, just the issue that I mentioned.
I suppose that in the rules, the phrase 'participate in a Car or Sale thread' could loosely be interpreted as 'view a Car or Sale thread'.
I did search before I posted and it seems I'm not the only one experiencing this issue. Not a biggie though, and the workaround is pretty painless.
And now it's 30% there.