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They...
- link to user profiles of both OP and answerers
- Mention that the content is from Stack Exchange (footer: Content from Superuser of Stack Exchange)
- Link to the original question (footer: Original article at Superuser.)
- None of the links are
nofollow
ed
So they satisfy the license requirementssatisfy the license requirements. If they didn't, we could add them to the list of license offenderswe could add them to the list of license offenders.