This is actually a plausible service for them.

Assuming a long-term return of 3%, in exchange for a $200 one-time donation, they could afford to spend $3 a year on maintaining a page and get another $3 a year to fund their operations. Right now, that's enough for 2GB of disk and more cpu and bandwidth than will be used long-term.

The biggest costs are likely to be customer service and abuse prevention. That could sink this.

You can already do this with the Internet Archive, just create a web page, submit it to the wayback machine, then publish the resulting archive link. Like this: https://web.archive.org/web/20210302145655/https://news.ycom...

Except if you lose the domain and someone else picks it up, they can setup a restrictive robots.txt and your page will no longer be visible in the archive.

False:

That's changed, as of 2017:

A few months ago we stopped referring to robots.txt files on U.S. government and military web sites for both crawling and displaying web pages (though we respond to removal requests sent to [email protected]). As we have moved towards broader access it has not caused problems, which we take as a good sign. We are now looking to do this more broadly.

We see the future of web archiving relying less on robots.txt file declarations geared toward search engines, and more on representing the web as it really was, and is, from a user’s perspective.

https://teleread.org/2017/04/24/the-internet-archive-will-so...

https://blog.archive.org/2017/04/17/robots-txt-meant-for-sea...