The Starwood American Express seems to run this deal periodically. They’re offering 1,000 bonus Starwpoints for each authorized user you add to your card, with a limit of two. The authorized user has to spend $150 within 90 days in order to get the bonus. Of course if you want to open the card in your dog’s name and want to do $150 worth of holiday shopping on behalf of little Fluffy, that’s fine too….
(Tip of the hat to MilesQuest)