static sites [are] not suitable for any business or professional use
I wouldn’t agree with this statement, there are plenty of businesses and professionals who are only on the interwebs to share their contact, biography or product knowledge base.
That being said, there are VPS providers running on libre software like vpsFree.cz which I use and can recommend. There should be more out there but I don’t keep track them, sorry.
There’s much thinner chance there exists a registrar caring about thee or thy software freedom though. People at sr.ht, LLC talks about setting up one but so far it’s just talks.
OpenNIC registrar (only be.libre seems to be functional) work without JS and thou can prolly ask them to license the site freely but non-ICANN domains are not practical for business or professional use due to the low adoption.
Ah yes, I bet thou canst also skip the booting part when thou runst software on thy compooter. And Jehovah (or an idol of thy choice) forbids any configuration or upgrade requiring a reboot.
If thou dissectst this even more clearly thou wouldof noticed OP asked about running a domain registrar or hosting provider, not using their service. Also the word was propietary.
Now, if thou excuse OP’s imperfect English thou can find a clearer description below:
Like virginity, it’s either with or without innit, or doth thou prefer thy olive oil lightly fucked?