I have a Github project that downloads all Imgur urls from osm to save as a backup (because many are uploaded without an account, meaning Imgur could delete them over time. Currently, there are 26421 imgur links in #osm and 18 are broken (4 of which can be recovered via my backup)
@thibaultmol I know the @internetarchive Archive Team are also archiving Imgur links, perhaps it could also check their archive as well?