The ad revenue is worthless compared to the facial recognition data it can generate. They've all got inward facing cameras, and most have outward facing ones. The company gets the absolute best marketing data they possibly can: demographic information, a face to match to other information, what products you looked for, how long you shopped around for a product, which products your ultimately bought

It's an immensely invasive system but incredibly lucrative for the company. Millions of data points for millions of shoppers nationwide to sell off