Having been a class member in many class actions, I can say that I have never seen any real benefit. I think I got less than $20 from Microsoft once, for example, and the terms given were calculated to cause further harm (they'd "donate" the remainder to schools in such a way as to funnel the money back to Microsoft). I actually spent a considerable amount of time writing up some opposition to that, only to be advised by a lawyer friend that while I had a few good arguments, I could not expect to get very far in court.