Rumor has it that RIM will be opening BlackBerry Messenger to Android and iOS. It’s not clear what their strategy is, but it looks like they might offer a watered-down version of BBM to other platforms, with more features like video and picture sharing available only to BlackBerry users, or for a fee. In general, the move makes a lot of sense because it would allow all smartphone users to communicate with each other without using SMS. The “Messenger” app would be a huge success but it would be strange for RIM to charge anything for this service. With respect to RIM’s total revenues, whatever money the messenger app would generate would be insignificant compared to device sales. If the strategy was to leverage messenger to sell more devices, that might be more fruitful for the company.