[EGreg]

How would third parties track you across websites now? Given any skill level?

I can think of only one: convincing websites to add a CNAME to point subdomains to their servers.

[vladvasiliu]

I don't work in the ad space, but it's my understanding that that's where things are going.

See here for Facebook, but I'd expect other providers to do the same.

https://developers.facebook.com/docs/marketing-api/conversio...