Archive.org is a bit of a special case, you need to call them repeatedly to archive a website. They do have a rate limit there, it's pretty aggressive* to the point you could trip it by manually using the site. They must have forgotten to limit the OCR files download.

* If they had a better API (a simple non-synchronous API would be enough, one where we could send a list of URLs would be even better), one could have made a lot less calls.