Comment by ForHackernews

> No but neither did Google.

"Google Analytics is used by 82.5% of all the websites whose traffic analysis tool we know." https://w3techs.com/technologies/details/ta-googleanalytics

Google's adware is all over nearly every site on the internet.

I don't even know what the real-world equivalent would be: maybe if you had to drive to the NYSE in an NYSE-provided vehicle (that could track your behavior to judge how much money you were likely to spend) in order to buy shares from the NYSE who sat on the other side of every trade in addition to running the market.