I don't have a problem with the way that one's set up because it's not some ridiculous pay per user per feature per month scheme like most SaaS. Paying $X per year for continual software updates without limitations on user count or features is good value and the self hosting option creates a natural limit on the scale (ie: no one's going to host 10k users on an instance).

Compare it to something like GitLab where I have the burden of maintaining it plus I still have to pay per user per month and deal with ridiculous feature tiers.

Which one is better value and less hassle for me? There's a big difference IMO.

Yep, however a bit further down it says you can do this as a one time purchase and keep using Domestica, forever, but you won't get updates after your subscription expires. I should probably update the docs to emphasize that more. This is a side project of mine, hopefully someday I can make the self hosted version free or OSS.