Yes, especially setting books, which I just like to read, and Kickstarter books, because I like to support those having run some myself.
I always intend to play a game when I buy it. That being said, there are games I've bought and never played and haven't regretted buying them. They were interesting in some way, and worth looking at on my shelf. (Woe unto me that I traded in most of my beloved collection in an ill-conceived trade for a couple newer and shinier books--I still kick myself over that.)
Kind of. I'll buy them knowing I have little chance of getting to play them, but I always hope I will. I don't think I buy stuff intending not to play it.