Hat down to @Gargron for stating clearly his position with regard to Keybase. I quote:
Admittedly, adding code to interact with any kind of proprietary, centralized service is something I generally tend to avoid. When I was approached about this by Keybase, they have been patrons for a couple of months, and I eventually refunded all of their pledges before making the call to avoid a conflict of interest. In the end, there were quite a few people asking for this feature
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!