What prevents Verizon from donating the Yahoo Groups database to the Internet Archive? What does Verizon have to gain from preventing the archival of Yahoo Groups?
I can imagine it's easier and safer (from a legal perspective) to just delete the data and therefore no longer be responsible for the content. Twitter wants to delete older Twitter accounts because they're required to by law under the GDPR. I mean, the GDPR makes things kind of difficult in this regard, and I suspect even archives are liable if somebody takes an issue with content they are hosting.
So, by analogy, if Twitter did allow people to download an archive of any public Twitter account's history... what would the GDPR require them to do? Wrap those archives in some sort of auto-expiring DRM?