The middle part of the mount is flexible, and a pair of USB ports built directly into the mount let users charge devices on the move. (digitaltrends.com)
A few card issuers provide statements that list authorized user charges separately from the primary user's. (creditcards.com)
An additional benefit to this arrangement, of course, is that you continue to earn miles whenever the authorized user charges purchases to his or her credit card. (valuepenguin.com)