I wouldn't use keybase where I need reliability due to their vague TOS (that came into effect around the beginning of this year): They can ban you from their service if they deem your actions outside their platform unacceptable.
Interesting, I had to check their ToS and found this which seems a bit vague:
"[...]use the Services to store or transmit any inappropriate content, such as content that: (i) contains unlawful, defamatory, threatening, abusive, libelous or otherwise objectionable material of any kind or nature" [1]
