Economics is helpful at times. This is one of them.
At $300/kilo, KBLB’s silks are competing against other materials for masks that likely cost under $5/kilo. There is no way people will be willing to pay 60 times as much for a disposable mask to have one made of spider silk that is no better than the much cheaper model.
When KBLB is talking about ‘medical filtration,’ think of dialysis machines that filter blood, not air filtration. $300/kilo excludes most everyday applications of our material. Even $50/kilo (the price of mundane silk of reasonable quality) places our silk outside of many everyday applications.
Lots of materials are $10/kilo or less. Why is spider silk 30 times better than that? Only when you can exploit the unique qualities of our silks to improve upon an existing product in meaningful and noticeable ways will GMO silks be employed.
It is a simple matter of economics.