The thing with Signature Plastics, is they don't make the bulk of their money from weird keyboard people. They make their money from businesses and corporations. This is just a side project for them. Once the overwhelming sorting and accounting happens and they're selling big bags of keys, it's not worth it to them. It's the same thing going to a steel mill. It's not financially feasible to babysit someone while they walk around a steel mill, find what they're looking for, slice a 1' of square steel tubing and send them on their way. I'm sure they feel the same way here.
What they COULD profit off of is someone placing a HUGE order of abs doubleshots, and that person individually selling sets. But this market/forum is so fickle and flighty, that there's no guarantee that you'll get your money back.
I'm not saying SP is right in this regard, but I think what they thought was going to be just offing their small stock, ended up being a processing nightmare, and probably won't make the same mistake twice (or offer bags of 100 random keys for $10, to lower the demand)