Library Genesis serves as an unofficial alternative to Internet Archive' Open Library, with no lending controls and copyright restrictions (as they operate outside of US jurisdiction and make no attempt to adhere to copyright law, similar to SciHub).
To your point, the Internet Archive most definitely needs to operate in a distributed, global fashion to prevent a single country from causing a loss of cultural data because of political winds or profits being put first. Mirror the whole thing on multiple continents.
SciHub is a web service that downloads papers on demand. In addition to serving the paper up, they also send a backup to LibGen, making LibGen's scientific paper section an archive of SciHub.
To your point, the Internet Archive most definitely needs to operate in a distributed, global fashion to prevent a single country from causing a loss of cultural data because of political winds or profits being put first. Mirror the whole thing on multiple continents.