It’s hard to know. As mentioned, the Digital Ocean one often confuses people because it runs their own install script. I don’t think their staff has ever responded to questions about it.
If Vultr were to put it in the marketplace such that it just cloned discourse_docker and encouraged people to run discourse-setup, that would be great (given that they upgraded the base Ubuntu image when the time comes). If they do something else, then it might be worse than nothing.