I was also with a provider that didn’t offer API access for the longest time. When they then increased prices, I switched, now paying a third of their asking price per year at a very good provider.
I guess migrating is difficult if the provider doesn’t offer a mechanism to either dump the DNS to a file or perform a zone transfer (the later being part of the standard).
Can only recommend INWX for domains, though my personal requirements aren’t the highest.
Really? They might use some GNU programs, but I’m sure the default user land for OpenBSD is all theirs. Just because you know
cp
etc. as GNU utils doesn’t mean the BSDs use the same ones. They are just part of the operating system. https://github.com/dcantrell/bsdutils tried to collect various BSD implementations for example