I can't see a difference in business model between the two. Both are buying threatening patents off the market on behalf of their "investors". Both claim they

I can't see a difference in business model between the two. Both are buying threatening patents off the market on behalf of their "investors". Both claim they will not sue people over the patents -- that they'll only be used defensively. It's only a matter of time before the member companies realize that this "patent protection racket" is just as bad as the trolls were. The only benefit is that they extract their fees slowly instead of in lump sums, so they are easier to budget for.