http://themarkup.i2p/the-breakdown/2020/11/12/how-private-is-my-pay-app
In a world where no one wants to come close enough to exchange money (and possibly germs, too), use of payment apps like PayPal, Venmo, Cash App, and Zelle has exploded. Between April and June, PayPal processed more than $220 billion in transactions, a nearly 30 percent year-over-year increase.