Thanks for making the world a worse place, Twitter, by giving in to the patent bullies, and setting an example for others. It's sort of "understandable" for small start-ups who would be ruined by the trial alone, but for companies that have billions of dollars in their coffers to do this is just plain pathetic and cowardly. Instead of fighting the problem, they become part of it and accomplices to it.
This also completely devalues the credibility of their IPA [1] patent thing. If Twitter gave in, why would everyone else who might've been interested in the whole IPA thing not do the same, too?
[1] - https://blog.twitter.com/2012/introducing-innovators-patent-...