I can't see myself buying a bit of plastic and waiting for 2 years for it to arrive. The benefit being realistically slightly sharper legends and marginally better colours over widely available in-stock keycaps that aren't GMK or whatever else. I just don't think it's fair to consumers and it's a bad business practice that shouldn't be endorsed.

I understand it when it comes to boards (most keyboards take way less than that to get produced too) because they need to know how many they are going to sell in order to figure out a profitable logistics/manufacturing route but I don't see a reason GMK would do that. They could just mass produce and people would just buy it because of their quality.