People get the choice all the time with loyalty and reward points cards. It's pretty much a unique identifier that people carry in their pockets and handover willingly every time they make a purchase. It's more obvious and in-your-face sure, but the principle is the same and they have the choice.

Personally, I handover all my fitness information, driving habit information, spending and banking and investing information, my health information, even my location data, my STD statuses, etc to a company so I can get massive discounts on a bunch of stuff in various ways. It alters my behavior in a good way, it alters other peoples' behavior too, and I'm all the more happier about it. I much prefer this over stupid things like sin taxes, consumption taxes and laws that most people don't stick to or agree with (talk about choice and consent, huh).

Maybe. But as of now: there is no choice.

People also chose to use Netflix or Steam (and other streaming platforms) instead of pirating. Last one would (and still is) be free. So it's not unprecedented.