I would argue that people are only willing to share all manner of personal data for free because they don't actually understand what is out there about them.

I live where HN has absolutely no audience, think middle of nowhere midwest. And I can 100% say that not one person I talk to has any idea what data is available about them, for sale, right now. They don't even understand why it's important to know what permissions your apps on your phone ask for.

I think if tech folks made an effort to get people to understand, in language they can access, what data is out there, we would see a massive (attempt at a) shift in how people use the internet

Edit: Proof of what I say, that i just remembered. My father is extremely right wing, pro-Trump. He was told, by whatever 'news' agency he happens to listen to on AM radio (Maybe Laura Ingram?) that Facebook was doing awful things and they explained, in the most basic terms, what kind of data Facebook may have on you. So father dear deleted his Facebook account.

And opened an Instagram.