Fats are not water soluble, but carbohydrates are. Therefore, to make an instant mix that involves fats, we must alter the fats in a way that makes them hydrophilic (or water-soluble).
We use Highly Branched Cyclic Dextrin (HBCD), a designer carbohydrate based on amylopectin (a massive carbohydrate). Since the molecules are so large, we are able to use less of them to do the job. HBCD is used by a lot of athletes because it has been shown to increase glycogen in the muscles, settle the stomach, and not raise insulin levels.
With the fat:carbohydrate ratio the way it is, and the nature of HBCD, Instamix should push you in the direction of ketosis (given a healthy metabolism). You'll have to use a blood BHB test kit to make sure.
For some people, who have maintained an unhealthy lifestyle for so long, their metabolism is broken. They could eat straight C8 - Brain Octane Oil and not move the needle. Others are pretty well set up to burn fats for energy and can get away with eating a lot of carbs while easily sustaining ketosis.