Yes, some manuals I know from other sites, others I had searched for in vain in the past. Concerning earning money: nobody is obliged to pay that and everyone may contemplate why he should. At least those of us who frequently search certain documents will soon have realized that some documents presented there are taken from other sites, or at least showed up there before. And even those sites not necessarily are those who put them online first. Those sites may already have gone under. And Butkus, highly praised here, even dares to claim copyright on all manuals he presents!
But I understand your feelings in this case.
Another thing are the courses. Those in the long past were not even available to me in the printed form. So I appreciate that the rights owners behind National Camera seemingly allowed to present them on the net. I shall look into them and maybe comment. About additional, payable courses we shall see.