It seems a lot of people havent heard of it, but I think its worth plugging https://perma.cc/ which is really the appropriate tool for something like Wikipedia to be using to archive pages.
There are dozen of commercial/enterprise solutions: https://www.g2.com/products/pagefreezer/competitors/alternat...
also the oldest of that kind and rarely mention free https://www.freezepage.com
Does Wikipedia really need to outsource this? They already do basically everything else in-house, even running their own CDN on bare metal, I'm sure they could spin up an archiver which could be implicitly trusted. Bypassing paywalls would be playing with fire though.
It costs money beyond 10 links, which means either a paid subscription or institutional affiliation. This is problematic for an encyclopedia anyone can edit, like Wikipedia.