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IIRC ArchiveTeam were bruteforcing Goo.gl short URLs, not going through 'known' links, so I'd assume they have many/all of Compiler Explorer's URLs. (So, good idea to contact them)

Real-time status for that project indicates 7.5 billion goo.gl URLs found out of 42 billion goo.gl URLs scanned: https://tracker.archiveteam.org:1338/status

Thanks! Someone posted on GitHub about that and I'll be looking at that tomorrow!