That's one of the things that should be linked to for further reading but it probably doesn't need to be given straight away.
The rate-limit error page:
Simply change that to this:
The last posting from your IP was less than <time> seconds ago. Please try again later. The thing you were trying to post was saved as a draft. This limit decreases substantially as your account becomes more established.
Code:
The last posting from your IP was less than <time> seconds ago. Please try again later. The thing you were trying to post was saved as a [url=https://bitcointalk.org/index.php?action=drafts]draft[/url]. This limit decreases substantially as your account [url=https://bitcointalk.org/index.php?topic=2766177.0]becomes more established[/url].
Yeah, it would be helpful to link to it there. The more times we give people this info the more people will be aware/educated about the rules and have it drilled into them. As I've said before, for most Meta is usually the last place people go hence why people don't know most of the rules and even then there's a lot of info thrown at them with multiple guides/stickies hence why it would be good to condense it and link to them for further reading.
And... something should be done about the off-site links in the Marketplace sections.
What do you mean specifically? Ebay links with no mention of accepting BTC? (dealt with when reported) Other marketplaces accepting Bitcoin which make transacting more convenient but attract scammers with their (often locked) self-moderated threads? (a warning bar will show up but people need to keep flagging these accounts) Something else?
Probably means the autobuy links. Probably at least 95% of them are scams. In these instances that's why I think a landing page with a warning would be helpful. Surprisingly a lot of people get scammed by these. Not sure why people would randomly trust these users but they do.