Crystal Spinning and deception
First off, we know the premium crystals give out <1% 4* chance and probably <10% 3* chance.
Don't you think it is a bit deceptive when you do a spin (although we know it's fake), that 4* show up in the spin about 20% of the time and 3* about 30% of the time.... For a neebie, it might be deceiving.