You're mistaking business proof with scientific proof.
The only proof KBLB needs from a business standpoint is that Spider Silk works the way the customer wants it to work. Although, scientific proof makes it an easier sell. But, KBLB only has to scientifically prove it works to customers requesting it. Once the product is in use by an end customer and the qualities and performance are on display, the need for scientific proof fades considerably after that.
I get what you're saying, in theory, but in reality KBLB can sustain business without scientific proof. I wouldn't worry about that scenario, though, as it is obvious Mr. T is shooting for both, commercialization and scientific verification. It just so happens he can commercialize his products without the latter. Good for us shareholders! Even better will be when the "scientific proof" backs the product!
DROP-IN AND GO KBLB! HOLDING THE GOLDEN!!!