Costco “Plain” Soy Milk
Having been raised drinking the stuff from time to time, I like soy milk. One thing people have to understand about soy milk... it doesn't fucking taste like milk. Much as we might love to believe it, soy milk doesn't taste good poured over corn flakes. It doesn't taste like cream when you get it in your coffee. It's basically liquid tofu.
Judging from the various ways in which vegetarian/vegan culture has tried to jam tofu into every conceivable crevice of their sad, anemic diets (cubed plain onto salads? Shaped and seasoned into steak and turkey? Come on, people), it doesn't really surprise me that soy milk has likewise been bent to requirements it cannot readily fulfill.
This is fine. I don't buy the stuff, because I just drink milk. Just like how I don't crumble plain wet cold tofu onto salad, because, well... I know how to cook, and I like my food to taste good.
If other people like it or need it, that's great. But call it what it is. If you're selling "PLAIN" soy milk, it shouldn't fucking have cane sugar and vanilla in it just because you think you need to make it taste like something that goes with Cap'n Crunch.