Yar. I just store them on my bookshelf.
In some of the Japanese restuarants around where I live, they also store them on bookshelves for customers to read.
And I see people sell them to used bookstores a lot. xp
But, I totally agree. It's such a waste to throw them away!
So expensive and so prettyyyyyy.

I think it's better to make something out of them. Like. A notebook. Or use them as wrapping paper, at the very least. xp