WhatsApp has shown that having a hugely popular mobile messaging app can be very lucrative and now BlackBerry is looking to cash in on its own widely used cross-platform BlackBerry Messenger service. We already know that BlackBerry is planning to incorporate ads and in-app purchases into BBM but the company on Tuesday unveiled a new version of BBM that could make the mobile messenger into even more of a cash cow. BlackBerry says that its new BBM Protected, a new version of BBM designed specifically with regulated industries in mind, will be available starting this summer for corporate users who value security above all else. The new service will have a monthly subscription fee, which means that questions about how

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