If your definition of crap is books that are not current bestsellers, then you may have a point. However, my definition of crap doesn't include the Harry Potter series and many extremely highly rated books like this.

There is also a lot of books that are mediocre at best, but there are plenty of high quality books in there. They may or may not be the type of books that you want to read though. In any case, you only get one a month, so even a handful of interesting free books will have some value.