Truth is, the company should have abandoned it's OS before they released their first touch screen device and go with Android. I remember playing with it (the Storm?). It was 2 years after the iPhone was released and it was two years behind the original iPhone.
The only moat to keep users they had was their messaging app, but Facebook Messenger and WhatsApp killed it with interop. And it's not like their userbase was as valuable as, let's say, Bloomberg chat.