That's an interesting proxy for measurement for sure, but there are others. It rests on the assumption that all privacy improvements will cost Facebook signific

That's an interesting proxy for measurement for sure, but there are others. It rests on the assumption that all privacy improvements will cost Facebook significantly. I don't think that has been demonstrated to be fact. It seems that many will but also many won't. Apparently, just for example, being able to obtain and delete their data didn't effect them in the same way.