Rather take this one https://bitcointa.lk/ all deleted posts are still readable on it.
I searched for some threads, but could not find them on there. Other threads there were way behind and had far less posts than the original bitcointalk threads. On the other hand some threads were right up to date and immediately archived anything I posted.
Why does it rapidly archive some threads, but not others?
Don't know, i think we need to ask the moderators about that.
Bitcointalk is harder for the crawlers to reach so what you see archived here is mostly manually archived by users like you and me. I'm not sure to what extend pages are automatically archived on Bitcointalk.
https://archive.org/about/faqs.php
Quote
Why are some sites harder to archive than others?
If you look at our collection of archived sites, you will find some broken pages, missing graphics, and some sites that aren't archived at all. Here are some things that make it difficult to archive a web site:
Robots.txt -- We respect robot exclusion headers.
Javascript -- Javascript elements are often hard to archive, but especially if they generate links without having the full name in the page. Plus, if javascript needs to contact the originating server in order to work, it will fail when archived.
Server side image maps -- Like any functionality on the web, if it needs to contact the originating server in order to work, it will fail when archived.
Unknown sites -- The archive contains crawls of the Web completed by Alexa Internet. If Alexa doesn't know about your site, it won't be archived. Use the Alexa Toolbar (available at www.alexa.com), and it will know about your page. Or you can visit Alexa's Archive Your Site page at http://pages.alexa.com/help/webmasters/index.html#crawl_site.
Orphan pages -- If there are no links to your pages, the robot won't find it (the robots don't enter queries in search boxes.)
If you look at our collection of archived sites, you will find some broken pages, missing graphics, and some sites that aren't archived at all. Here are some things that make it difficult to archive a web site:
Robots.txt -- We respect robot exclusion headers.
Javascript -- Javascript elements are often hard to archive, but especially if they generate links without having the full name in the page. Plus, if javascript needs to contact the originating server in order to work, it will fail when archived.
Server side image maps -- Like any functionality on the web, if it needs to contact the originating server in order to work, it will fail when archived.
Unknown sites -- The archive contains crawls of the Web completed by Alexa Internet. If Alexa doesn't know about your site, it won't be archived. Use the Alexa Toolbar (available at www.alexa.com), and it will know about your page. Or you can visit Alexa's Archive Your Site page at http://pages.alexa.com/help/webmasters/index.html#crawl_site.
Orphan pages -- If there are no links to your pages, the robot won't find it (the robots don't enter queries in search boxes.)
Edit: My bad, you were talking about a different site.