Google in its current state. And only because their current iterations of social networks have failed.
Further google does far too much as it is. I don’t want my emails parsed to figure out what ads to present, or my uploaded files.
The addiction mechanisms are a separate class of harm, and I recognize them from when games, far more than social media. They came much later, and were not part of business models back when Facebook etc. were created.
The misuse of personal data to harm people and privacy is a known idea. For example, they were warned about back in the day by people such as Huxley or Orwell.
Either way, this is an odd conversation.
These harms were clear and known.
If you are saying You didn’t see it, then that’s fine many others didn’t see it or believe it.
If you are saying I couldn’t see it, well I have long ago acted on what I saw and believed and oppose Facebook and other similarly privacy invading systems. I’m not happy with the old British surveillance state from the 90s - and I’m neither British nor American.
If you are saying the specific detailed break down of the harm to be caused was not known- sure. I cannot tell you which incident will finally trigger X event but I can predict that you won’t have autonomous cars, (since I see people driving in the wrong lane in the opposite direction of traffic very often where I live)
And a final point - the addiction mechanisms are just being cross pollinated from other systems, just like AB testing and other research helps ensure people stay on web pages.
Your deeper problem is that advertising, once a tool, has now become and end in and of itself.