Just a quick thank you to Alan and the team for putting in the hard work and providing the information he feels able to. I've no problem with them keeping the IP to themselves, I probably would do the same in their position. Just give us what you can.
It's not true that big companies can ignore patents in the hope you can't afford the legal bills to enforce them. There are quite a few companies that make a living lending money to fund litigation. Check out companies like Burford Capital.
The goal of the patent troll is to bankrupt the legitimate smaller patent plaintiffs and buy their patents.
Using the justice system to make money gives patent trolls a financial advantage because patent troll plaintiffs are typically immune from defense strategies large business employ against legitimate smaller patent plaintiffs (e.g., litigation costs are significantly higher for the defendant or infringer than for a purported damaged plaintiff who has a "no recovery, no fee" contingency-fee lawyer; until recently trolls had an almost-unrestricted ability to choose plaintiff-friendly forums, frequently the Eastern District of Texas).