It was probably adtech companies. There are a bunch who basically pay apps to use their api and then take the data. Apple was right to kill that imho. IIRC th

It was probably adtech companies. There are a bunch who basically pay apps to use their api and then take the data. Apple was right to kill that imho. IIRC that was foursquare's pivot There is also lot/lon in programmatic bid requests, but I don't think they're super accurate or granular and lots of fraud. (could be wrong, just from my small experience buy side using DSPs seeing lots of lat/lons being smack in the middle of a city) [1] https://www.safegraph.com/guides/mobile-location-data-providers https://www.safegraph.com/guides/mobile-location-data-provid... [2] https://developers.google.com/authorized-buyers/rtb/geotargeting https://developers.google.com/authorized-buyers/rtb/geotarge... [3] https://fixad.tech/wp-content/uploads/2019/02/3-bid-request-examples.pdf https://fixad.tech/wp-content/uploads/2019/02/3-bid-request-...