> But why the F... would my bank want to notify FB that I am using their app? Probably for ads: either measuring ad conversions, or building ad targeting/exclu

> But why the F... would my bank want to notify FB that I am using their app? Probably for ads: either measuring ad conversions, or building ad targeting/exclusion buckets. For example, your bank can exclude your devices from their FB ads because FB already knows you have their app and presumably a customer.