I'm an image collector by nature, so I would be grabbing this stuff regardless of knowing if the game existed. I would also be doing this stuff anyway as well since I want more girls, especially girls that nobody else seemed to cover (I sometimes have strange tastes or go for the obscure), so I just take the extra few two or three steps needed to share them because I know that, even if there are fewer fictional girl users here, there are still people who use them.
So to me I'm not wasting my time, especially since I know the majority of people who do use these girls never speak up about it, because that is the nature of forums. I can't speak for you, that's something you need to figure out on your own.