McCormick's (I think that is where Jesto went) orientation is to supply commercial builders where the building spec for this item probably reads 2 inches of 3Lbs per cu ft compressed fiberglass insulation. The builder could care less what brand it is, only that it is cheap from a supplier where he has an account.
I'd say asking for much is a pipe dream and if we annoy McCormick's enough they will close the doors for us little guys. Comparing prices around the country they sell the Linacoustic at a bargain rate. Some DIYers have been forced to pay double what we are paying. Now they may have both in stock and be willing to swap out the Certainteed for the JM.