I have some feedback for OP: my personal website got 92% because there is a link to my X profile in the contact session. It's not like it relies on the service. Its just a contact and there are also links to other services such as self hosted matrix.

On the other hand my registrar is Namecheap which is in the US and your tool didn't checked for that. I think thats a lot more important in terms of dependance than a link to a social network so you could run a whois lookup to check what registrar is hosting that domain.