It might correlate it with other vendors and signals (e.g., your trail of visited web sites, completed purchases, etc.) and also deduce it by monitoring your ge

It might correlate it with other vendors and signals (e.g., your trail of visited web sites, completed purchases, etc.) and also deduce it by monitoring your geo position to find where your “home” is (wherever you spend most nights / wherever you use your apps late or early in the day) and then use zip code area demographics to get the average income for that area. Oh… and, credit card companies selling data (to these same data aggregators) on their members’ buying habits and most probably demographics as well (age, income, etc.)