Ferdi messaging browser repository deleted, website offline

I'm struggling to find a free alternative, the others (Franz, Rambox) seem to be crippled until paid for. I wouldn't even mind paying, but their entry level tiers are around $6 a month.... Seems high for what you get

Ferdi is back once again online. now website is working, but it is not hosted on github.

A sad and somewhat mysterious day.<p>I wonder what the back-story is to this event?