Ok, let's move on and assume the designer get's barely anything. Let's say 2.5%, otherwise the designer wouldn't have any motivation to keep going and push the GB.
What about the retailer? This is tricky. Depending on the industry retailers can get between 10-30%. But this market isn't really liquid. There are not many manufacturers. And the few have longer lead times than a car manufacturer. So the retailer doesn't have any negotiation power.
However, they are just few retailers/per continent with a loyal customer base with a strong collector mentality. Hence, a company like GMK is also quite dependent on the resellers. And the biggest advantage for the manufacturer: It's a group buy! No risk, no inventory, no working capital, so let's go to the top: 30%.(to go further, they don't even need product designers, marketing, anything).
Then, we end up with (again from the retail price without VAT!):
- GB Designer: 2.5%
- GB Online shop/distributor, eg Candykeys, NK or Drop: 30%
- Key cap manufacturer, eg. GMK: 67.5%%
Does this make sense?