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I used to work for a company that sold location tracking data. It was amazing how cheap this data is and how many sources you can collect it from. We would buy data from 3rd party sources and often have our own data sold back to us, sometimes straight up, and sometimes after randomization added to avoid exact matches. We had a whole system built to compare incoming data against our own data to make sure that we weren't having too much of our own data being sold to us.

why waste resources when people -voluntarily- give their info up? It would make no logical sense.

If the damn thing is free, you're the product :/

I take a more extreme view. My confidence that it is absolutely intentional and that significant planning went in to arrive at this point is in the region of 99%.