It's a hard problem to solve, because its easy to temporarily donate resources to archiving ops via the ArchiveTeam warrior, but a long term commitment to run persistent compute and storage to mirror a chunk of the internet archive. It's why I think Filecoin isn't going to work either; very little overlap between the people who feel its important to keep these archives alive versus people who would run distributed storage to collect financial compensation for doing so.

Easier to send fiat to IA for them to invest (~$2/GB) and to pay to keep the disks spinning somewhere safe across the world.

(ia volunteer, no affiliation otherwise)