> in connection with our provision of the Service.
This is pretty much boilerplate legalese that's generally intended to mean "you can't upload a file to your public folder, then sue us for copyright infringement because that file is in a public folder".
Lawyers seem like to cover their clients' asses as much as possible, but for a service like this that's designed for privacy-conscious people it'd do them well to step back and think about how the license comes across to privacy-conscious laypeople.
From what I've seen of Keybase, from back when they were just an alternative to the PGP Web of Trust to now, I don't think they're genuinely planning anything nefarious (but they'd still do well to have a ToS that reflects that).
What you're describing is "for the sole purpose of proving the service to you". The "in connection with" language is much broader. Whether the license is intended to give them more leeway or not is a different question.
This is pretty much boilerplate legalese that's generally intended to mean "you can't upload a file to your public folder, then sue us for copyright infringement because that file is in a public folder".
Lawyers seem like to cover their clients' asses as much as possible, but for a service like this that's designed for privacy-conscious people it'd do them well to step back and think about how the license comes across to privacy-conscious laypeople.
From what I've seen of Keybase, from back when they were just an alternative to the PGP Web of Trust to now, I don't think they're genuinely planning anything nefarious (but they'd still do well to have a ToS that reflects that).