Archive.org is the archiver, rotted links are replaced by Archive.org links with a bot.
Shortcut is to consume the Wikimedia changelog firehose and make these http requests yourself, performing a CDX lookup request to see if a recent snapshot was already taken before issuing a capture request (to be polite to the capture worker queue).
You can see a text box for it on the right, if you go on the waybackmachine's homepage. I used it yesterday.
Anyone can request anything be removed and they may honor the request: https://help.archive.org/help/how-do-i-request-to-remove-som... they say nothing about only removing things illegal in the US or anything like that, meaning they can and will remove things based on personal judgements about whether it should be archived.