Overall, the article highlights a geolocation data leak from Gravy Analytics, exposing apps that collect user data without consent. Surprisingly, the author found their data being shared with Unity, Facebook, Moloco Ads, and others. Insights into RTB auctions and OpenRTB protocol are shared, questioning the necessity of sharing data like IP, location, and personal info. Mention of data brokers selling user information for profit, like Redmob offering a $120k/year dataset, and AGR Marketing Solutions providing PII like names and phone numbers linked to MAIDs. The article concludes with a step-by-step guide on how to track yourself using free apps and purchased data.
https://timsh.org/tracking-myself-down-through-in-app-ads/