I understand, but MOQ is low enough for KAT that this shouldn't really be an issue. Besides that, it really doesn't make much sense to combine ortho and 40s. It'd make a lot more sense to put 40s in base, maybe create an extra bars kit and combine ortho with ergo instead. If anything here is at risk of not making MOQ it's ergo.
It may seem like MOQ is low for KAT but I think perhaps you're not considering that
minimum key unit amount must be created, which is 24k units.
For example, a GMK set without custom colors may have 120 keys in the base kit, so with a an MOQ of 150 that would only produce 18k units. Considering extra kits such as 40s, spacebars, novelties, those would add a couple thousand more units.
So I would say that Keyreative MOQ is actually comparable to GMK vs SA which truly has low MOQ (with the offset of high pricing).
The benefit of Keyreative is that childkits can technically have low MOQ since it's easier for kits to help each other out to reach the 24k units collectively, but the minimum of 24k units must be met regardless. So for GMK, even if 500 base kits are sold and only 10 kits of 40s or ISO, those child kits will not make it. With Keyreative, the extra numbers in base will help the child kits which is awesome