Not sure I understand this, but "I" (coveredca) pay linkedin to place my ads, for which "I" have to use their libraries? That then scrape "my" clients/custome

Not sure I understand this, but "I" (coveredca) pay linkedin to place my ads, for which "I" have to use their libraries? That then scrape "my" clients/customer data to linkedin? for them to make more money selling that data? Does this also mean that those pious popups about "Do not sell my information" are essentially vacuous?