Public VPNs only protect you from your ISP
replyAnd, arguably more importantly, from the service you're using.
replyI think you are misreading his comment. He is saying that on a VPN it is standard behavior that if you visit site A and site B they will both see you connecting from the same IP and can infer you are potentially the same person.
replySite A and B have to collude in order to make that inference. Outside of Cloudflare, no one is colluding at that level.
replyPlenty of people own more than one website. You're also forgetting about random site assets like web fonts, CSS, JavaScript CDNs, etc. etc.
replyThat would only be true if there were no ad networks.
replyBut today’s internet is essentially a giant ad network.