Not necessarily. The clause only seems to apply to the binaries provided on the iTunes or Google Play store, and not to the actual source code, which is BSD lic

Not necessarily. The clause only seems to apply to the binaries provided on the iTunes or Google Play store, and not to the actual source code, which is BSD licensed [1], or any binaries you might build yourself. I am speculating that the clause is intended to be part of the Keybase terms of service, but because the software and service are tightly coupled, it is phrased as a software license restriction. [1] https://github.com/keybase/client/blob/master/LICENSE https://github.com/keybase/client/blob/master/LICENSE