Not sure that buying Keybase, a company that originally uploaded people's #GPG #privkey by default, is going to add any understanding of security at all. I've avoided them since I discovered they were uploading private keys by default (though I've heard they later changed that) because that indicated they did not know what they were doing.
I am glad that Zoom seems serious about fixing their issues. I just don't think this is advancing toward that goal. Now, instead of one business with severe security issues, they have two businesses which might have such issues.
Someone recommending the closure of #Keybase accounts and rotating keys, passwords, and anything else that KB has touched.
I probably have not been as vocal about it, but ever since I personally discovered (very early on in KB's existence) that following their default instructions uploaded your #privkey to their server, I have recommended avoiding them, cancelling any keys used with them, closing any existing KB accounts. I still feel that way ... and tying up with #Zoom is unlikely to improve my opinion of them.