This is really really messed up. Besides the usual patent troll options of:

- (costly) settle

- (costly) fight

There is now a third option of:

- (profitable!) join the bandwagon, not get sued (by this particular company), strengthen your own IP defence position by gaining licenses to the entire portfolio that was threatening you in the first place. There's even profit-share for settlement revenue!(Edit: profit-share might be for "board" seats only, but it sounds like it costs IP contributions to get in anyway.) All for a low low cost of transferring over some patents (that are just licensed right back to you). Of course this just enables more of the other companies to get sued.

This has a potential to get really out of hand, really fast. :(