Blackberry thought BBM was their moat, and for a while it did seem that way. Teenagers worldwide were buying what had been a boring business phone just to get a

Blackberry thought BBM was their moat, and for a while it did seem that way. Teenagers worldwide were buying what had been a boring business phone just to get a BBM ID. Then some shinier phones came along and turned out no one really cared about which app they used for texting.