When BlackBerry released BBM for Android and iOS last year, it gave the company a much-needed hit that helped spark hope that the one-time smartphone titan could get a fresh injection of revenue from its popular messaging service. On Tuesday, BlackBerry released a new update for BBM that delivers one of the many ways the company plans to make money from the service: Stickers. For the uninitiated, Stickers are basically little cartoon characters that replace the traditional emoticons in your BBM chats and make them more colorful and expressive. They’re essentially BlackBerry’s attempt at adding optional in-app purchases that have help companies such as Candy Crush Saga maker King rake in huge sums of cash and interested users can buy packs of