Mind elaborating?

I'm not the parent poster, but I worked in ad tech.

With third party cookie policies getting more stringent, many websites now use either a reverse proxy within the first party domain that points to third party servers, or they use a first party subdomain that points to third party servers.

In either case, it allows the servers belonging to the data gatherer to appear as first party, thus getting around third party cookie restrictions.

Combine that with browser fingerprinting, and you now have a harder but very viable way to replace the functionality third party cookies previously had.

I guess he means something like all requests to www.yoursite.com/foo123/BAR proxies to www.soulsucking.com/BAR

A company has multiple websites and all of them use a reverse proxy for tracking. (a webserver that is between clients and the real webserver and just "proxies" requests and responses between them, logging all that happens)

This is completely transparent from the outside.

This is rather offtopic but it bothers me how most people in IT seem to use 'transparent' to mean 'opaque'.

When I hear PMs say "this change will be completely transparent to clients" what they mean is, the client will see no difference, which means really, the details are hidden in a black - opaque - box.

It should make sense if you realize "transparent" means "no visible difference".

Transparent has a unique meaning in the context of computing And a different one in design, business and physics.

Importantly however; Tech people can claim they are being 'transparent'. To them this can mean no visible difference to the user- and to everyone else means visible/public and available for scrutiny.

So yes, I am sure Zuckerberg is focused on 'transparency'.

Quite so. A less intentionally disingenuous word for the computing context would be "hidden".

Personally I could care less. There are literally billions of words that sometimes mean their own opposite.

Unclear whether this was an ingenious comment that points out the daft American multi-word expression "I could care less" also means it's own opposite.

But, I'ma guess probably not.

You could look at "literally billions" and try guessing one more time.

I don't understand.

Doesn't transparent mean that the interface stays the same and clients can interact with the system in the same way as before without the need to change their code?

This makes little sense. Unless their reverse proxy is in front of every website they provide analytics for (like CloudFlare!), Then I don't see how this is means anything.. most analytics companies don't do this - really it's just CloudFlare that I know of...