Agreed, file sharing via Keybase is a dream. It automatically creates an encrypted folder on my filesystem that is shared with the other party. Super convenient, I tried to evangelize it solely for this reason.
I popped over for a glance, as I have been seeing a need for something very similar.
pricing 5 GBP per month - I read over that 4 times and it kept becoming 5 GB in my head... might I suggest adding $7 US per month and $80 per year perhaps.
then I checked the terms and I saw UK law - which has fluctuated a lot with content that is okay and not okay.. and then the word "obscene" is in there.. and other stuff that makes me wish this was hosted elsewhere.
perhaps for an extra X$ one can choose to host an instance on other locations and avoid some of the uk things I dunno.
The closest Keybase alternative I've found so far is https://keys.pub/ (on HN: https://news.ycombinator.com/item?id=22995792)
Welcome any suggestions for KBFS alternatives!