Ok, so tell me this: if they have a setup product with a supplier (they do sell keycaps so they must have) what prevents them to leave the injection moulding machines run... forever? If the demand is so high? These machines are capable of insane output for low cost after they are setup. They simply create demand to keep the prices high. This is a different business strategy, similar to business class airline tickets or exclusive fashion clothes. They only need to sell fraction of the quantity for thousands of percent of markup and they can make more money than a mass manufacturer. This whole system if fed by people on social media overpraising pieces of plastic they waited for years.

That's also not that hard pantone is literally made for this very purpose and everyone is using it for overseas manufacturing. You order your plastic in pantone xy and since they are looking on the same standard you will get exactly what you asked for. They are also an established business I dont think they still struggle with things like finding a supplier who can make a specified color

This is a scaling issue not tooling or machining. Injection molding is literally everywhere and even the crappy mcdonalds toys come with double moulded plastic these days. Also a keycap is like the most barebone simplest shape you can make on such a machine. They could spit out a full 101 keycap set in every 10 second if they wanted to. It is very possible they just play the "premium brand" game and sell cheap plastic while creating demand from shortage and paid ads on every platform.

Google maps has the exact same feature they have unique address for every location and it works with google maps search. It makes addresses like WGQ+357 and if I remember correctly If you know the city and neighbourhood you only have to remember the numbers. I use it for instructions in delivery app. The app did not allow short links so i just write "google maps XXX+000" and 8 out of 10 couriers managed to find me