Litigation is rarely a smart move for a licensing organisation. During the years wasted going back/forth during appeals etc the competitor has a price margin advantage which they can use to increase market share. It's not that easy to quantity that if damages are awarded.
And seriously you either need to put up or STFU. If you have some prior art that invalidates specific patents then speak up. Plenty of companies would be very, very interested. But I'm going to take a guess that you don't.
