If your doorbell rings unexpectedly, it's probably just your neighbor stopping by for a chat. But it could be the Publishers Clearing House (PCH) Prize Patrol letting you know that you've won $10 million. PCH is one of world's largest direct marketing organizations. Once known primarily for its magazines (and PCH giveaways), these days the company makes most of its money from direct mail offerings for household items, personal care products, entertainment, collectibles, and food items. More than 40% of the company's profits go to various charities.