The whole "need to be a professional brewer" thing is pissing me off, and with other products than Brewtan B.
I've got the money, just take it already. So long as I'm willing to buy whatever volume you're selling, what do you really care? White Labs has several strains that I'm interested in that are "Pro Only." Just doesn't seem a good business model.
I understand not wanting to sell at homebrew volumes, as is the case with real invert syrup. But seriously, if I wanted to buy a tanker load of invert, and had the cash, the fact that I'm a homebrewer shouldn't be a reason not to sell.