>So it’s not at all implausible (or even unlikely) that this represents an event where a user opened Grindr (conceivably sold to Gravy by one of Grindr’s ad partners following an impression), and the same individual’s location was determined by some other method (for example, IP address geolookup, or bought from a company which IS supplying data to Gravy directly and has location permissions).
There's a pretty big difference between "grindr sells your inferred information from IP" and "citymapper sold your location data". Even though the latter technically could be limited to the former, it's pretty obvious that most people think it's selling your precise location as determined by GPS or whatever. Just look at the other replies to my comments if you don't believe me. This is important, because not all "location data" is the same. People are far more likely to be creeped out by precise location data than ip location data, and you're basically constantly transmitting the latter every time you use any app/website.
There's a pretty big difference between "grindr sells your inferred information from IP" and "citymapper sold your location data". Even though the latter technically could be limited to the former, it's pretty obvious that most people think it's selling your precise location as determined by GPS or whatever. Just look at the other replies to my comments if you don't believe me. This is important, because not all "location data" is the same. People are far more likely to be creeped out by precise location data than ip location data, and you're basically constantly transmitting the latter every time you use any app/website.