The Blue Cash Preferred Card from American Express now offers extra cash back on 5 additional streaming services.

The cash-back card expanded its list of streaming services that let you earn rewards. Here's how to maximize its value.

You get bonus rewards of 3% cash back at U.S. supermarkets, U.S. gas stations and U.S. online retail purchases. Terms apply. If groceries, gas and online shopping are significant parts of your ...