Your PayPal account is a money market account. It earns interest because PayPal, Inc. engages in overnight trading. At one time, my PayPal was earning in excess of 5% interest, which is phenomenal for a money market, particularly considering they don't charge fees. Ever since the market went south, however, the interest rate plummeted, so I keep my money in an enhanced checking account now, which earns 3%.
"Nonstopdrivel" wrote: