Under the company's new invite-only Ad Verification program, Amazon is tracking what ads participants saw, where they saw them, and the time of day they were viewed.The deal is part of the Amazon Shopper Panel, an invite-only program where select Amazon customers can earn $10 per month if they upload 10 eligible receipts from purchases made outside of Amazon.The Ad Verification program — currently limited to US and UK-based Amazon customers — was launched in the wake of concerns from privacy advocates over how Amazon handles sensitive user data.And there have long been concerns over how the company uses the data from its smart home devices like Alexa and Ring, CNBC reported.In 2012, Google launched Screenwise, a program that gave volunteer users $5 Amazon gift cards — with additional ones every three months for up to a year — to download a Google Chrome browser extension that tracked what they did on the internet, Ars Technica reported."