OpenBSD in Amsterdam: VMs on vmd(8) servers
openbsd.amsterdam
openbsd.amsterdam
I also like that they publicly state their support for the OpenBSD Foundation. Given the transparency about their approximate userbase and donation amounts, one could even roughly predict how much they will donate per year. Among other things on the site this makes me trust them more, as it's not the info you'd expect from an untrustworthy person.
Good luck!
Here is the onboarding guide: https://www.romanzolotarev.com/openbsd.amsterdam.html
There's also the manual upgrade method, for an example of what that looks like, here's the guide for going from 6.2->6.3: https://www.openbsd.org/faq/upgrade63.html#NoInstKern
I have an OpenBSD router at home and the only negative part is about once every two years when I feel the need to catch up on the latest release.
Because then it needs a null modem cable and direct access.
So when someone is selling remotely managed OpenBSD VMs my natural question is how to do release upgrade.