We Dutch call it “Kalium zout” or Low Sodium Salt. The brand I buy is iodized and has 70% less natrium. And yeah, it is for health reasons, like heart condition, high blood pressure and other medical ailments, or people who want to eat less salt in their diets.
Anyway, what you are looking at is 100% salt and original op (the one on xitter) is an idiot.
I always mix those up because we also use Kalij and Natrij for K and Na and potassium and sodium is just off. At least sodium I can get from sodium bicarbonate.