Site A and B have to collude in order to make that inference. Outside of Cloudflare, no one is colluding at that level.
Plenty of people own more than one website. You're also forgetting about random site assets like web fonts, CSS, JavaScript CDNs, etc. etc.
That would only be true if there were no ad networks.
But today’s internet is essentially a giant ad network.
Plenty of people own more than one website. You're also forgetting about random site assets like web fonts, CSS, JavaScript CDNs, etc. etc.
That would only be true if there were no ad networks.
But today’s internet is essentially a giant ad network.