[rnts08]

I used to work at an online video advertisement company, you'd be horrified how much information we tracked across all the ads, especially since the ad was played with a special media player "plugin" loaded inside the other media player.

This is how ad companies can sell premium views, don't show cosmetics to men, increase car related ads to people who has watched other car related ads and so on.

There's no such thing as server-side "private browsing".

[tremon]

> This is how ad companies can sell premium views, don't show cosmetics to men, increase car related ads to people who has watched other car related ads and so on.

It's really not. They already could do all that before cyberstalking was normalized. It's called content-based profiling, and it doesn't require any GDPR consent.

[p_l]

The ad companies wanted to aggregate information across multiple channels.

The example about "show more car ads to someone who watched other car ads"? It's not about showing car ad on a site whose content is about cars (or where the site owner decided they like that kind of thing).

It's about knowing you have wandered over to car comparison site recently so they can show you car advertisements when you look up sports news, show car-related merchandise when you're browsing some shopping site, show you insurance ads, etc.