I'm not seeking to defend Vultr here, but perhaps people need to think about this in a sensible manner.

Given the way of today's internet, with GPT-bots crawling your stuff without your permission to use in their services, and with search-engines crawling and generally providing means of content removal that have limited effect .... what else are Vultr supposed to do ?

If you are granting them permission to, for example, "display" your content. Then there's not much they can do if you cancel your Vultr account but your content remains part of the GPT training material ?