carl Hmmm, I think the sites that block VPN's block a wide range of them. Though it will also depend on server location, etc. I think choosing a fairly large VPN provider (Nord, Proton, etc.) and a fairly common server would mitigate the issue of false positive/negative as much as possible.
Edit: https://www.ip2proxy.com/ I don't know how many websites use this service, but if they do, I don't think server/VPN-provider makes that much of a difference