I did that too for someone who had it on their wishlist.
My biggest problem is most of the games that go on sale, people already own them yet or don't bother to put things on their wishlist. So many of my friends have blank wishlists or only like 4 items, that are all $50 each.
If you have an interest in a game, add it to your wishlist! Who knows, someone might end up getting it for you