Earlier quoted context omitted.
What law would you propose? I think the hard part is "Instagram and TikTok remain free-with-ads."
Would ads still be worth enough if they were targeted based on things like what you watch/read/follow/subscribe to on that platform and your general location? Or can instagram only be free if ads are targeted to detailed profiles of individuals built over decades as they are tracked across the whole internet?
Yes. Targeted ads need to be 100% to 700% more efficient than regular ads to be as profitable: https://news.ycombinator.com/item?id=43996623