Vertical integration means owning the farms, production facilities, shipping and distribution, retail fronts, and maybe even operating some form of fast food franchise.
The only thing that could possibly make soylent faster than fast would be drive-thru. If I could order a 24 oz. soylent for $1, instead of a strawberry shake, I could envision a future where I might actually eat soylent more than once a week and across a cumulative duration of longer than 4 weeks per any given year.
No way. I can scrape by on ramen, potato chips, soda, hot dogs, orange juice concentrate, cereal and milk, and come out ahead (YMMV).
GNC quality protein shakes be damned. This stuff has to hit the 25 cent mark, per glass, to qualify for it's target market: the unwed and unloved who have no one to cook them decent meals while toiling away at shit jobs.