mfourThere have been numerous discussions on this.
1. The price of each smaller set would be minimum $30
2. The MOQ for each smaller set would still be around 150
This means everyone would pay more and none of the sets would reach MOQ anyway. By bundling them into a slightly larger set allows the price to be about 10-20% of what the smaller sets combined would cost and the MOQ can be reached more easily.
So for paying for ~20 useless keys you are making sure almost everyone gets what they need at a tolerable price.