Other posts have been going on the whole thing already and can describe better than I do but the tl;dr is: walled gardens fr ratio aura farming where you can only get in if you were already aura farming ratio somewhere else that messages about their exclusive membership info in the first place. Plus, wastes a lot of money either on your own hardware or on someone else's, in difficult times where spending money on hardware is a bad investment for non-corporate judicial persons in the first place.