Subject: Getting to old posts: Webarchive
If you have saved links to boards.fool.com posts, I've discovered web.archive.org. Just paste in the link to the field, and the original content (if they crawled it) comes up.

Example:
https://web.archive.org/web/20...

No idea when they stopped (or started) crawling boards.fool.com, or which boards. But MI was one of them.