It’s hard to find first hand sources tbh, but here’s as close as you can get from the guy who invented it. They decided to keep it exclusive because of how difficult it is to work with, and because they just aren’t actually in the art business.
We can’t work with hundreds of artists. We don’t have that scale - it’s just not our business. Our business is to create engineering components for satellites.
Is Kapoor a dick? Idk, probably, that’s not my call to make. I just know that Stuart Semple is probably just as much of a dick.