Please don't trust keybase for anything important. I view them as just another 3rd party and centralized point of failure.
Keybase is not a substitute for the web of trust and proper verification! Please don't treat it as such!
I don't trust the keybase wrapper for gpg, and I certainly don't trust crypto in my browser.
That said... I believe crypto should be used more in general, and if the barrier to entry for the general population is too high as people keep claiming it is, and if keybase is trying to make it more commonplace, then perhaps it's worth giving them a chance.
A signed json object linking github.com/jpouellet and keybase.io/jpo:
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