[sweetjesus]

I don't think PP worded his point as clearly as he could but I think he meant something more along the lines of "a small list of free books that is vetted for quality is much more valuable than a big list of many more free books that includes duds". There is an intersection between that point and the point you made/and responded to which is, "some books (and therefore vettings) are so valuable they might be worth paying for over a less good free alternative" ... of course weighted for the amount of disposable income a person might have.