Re: Blackberry has a good case and chance to win...
You have a strange definition of 'patent troll'.
Patents are IP which mean that they have value and can be bought and sold. A patent troll is someone who buys patents with the sole purpose of extorting companies to pay licensing fees which is the only source of revenue for said company.
Blackberry isn't a Patent Troll by any sort of the word since the patents in question originated w Blackberry.
(Would you call Motorola, Nokia, Ericson or other tech companies which sue to protect their IP and licensing revenue patent trolls? )
Even still, the point I was making was that the patent is in place and the burden of proof to overturn the patent relies on the IPR, FB and Snap. (Assuming that FB and Snap can get the IPR to review the patents. ) If not, then they have to go to Court. And even then they may not be successful.
That is to say that FB and Snap have an uphill battle where they have to show why Blackberry's patents should be invalidated.
Because of this... the odds are in Blackberry's favor.