Personally I'm not worried about the possibility of certain unknown program changes in August. Maybe they just do deeper integration of the website (e.g. book SPG, MR, and RC properties all from one web address). Maybe they just do some higher level integration of the earnings program (e.g. stay at a SPG property but credit directly to your MR account for elite night qualifying purposes). There are so many possibilities of what they might (or might not) do it's hardly worth worrying about or contemplating a lawsuit.