So slightly tangental but keybase has been around for a few years now, right? I haven't been able to figure it out but are they only afloat due to investment fu

So slightly tangental but keybase has been around for a few years now, right? I haven't been able to figure it out but are they only afloat due to investment funds? Do they have any monetization plans? I setup a profile but I'm curious what the company ends up turning into. Perhaps the money made from providing paid upgrades to this filesystem can give them enough profit?