While I agree in concept, it would seem that this is one of those times when we have to step back and take a look at the big picture. What we want is smaller quantity so we do not have paper sitting around - What Ilford wants is the correct size package to sell in a given size and still make a profit. A tuff one, not matter how you look at it...but Ilford must have people that track sales, size, etc and must have come up with the 50 sheet package because it is one of the cost break points for them. In all honesty, the purchase of a 10 sheet package - once in a while (speculation on my part, but otherwise a person would purchase the 50 sheet package) would not actually have enough impact to the bottom line to make it worth the expense to Ilford of said package.
One could say that because Ilford does not offer a 10 sheet (or 15,20,25) they would actually sell MORE paper, but do not because it is not available in the count size customers want (and this may indeed be the case), but packaging (and this is a speculation again) is based on how the consumer purchases product. Now for the life of me, I can not understand why you can not purchase 12x16 in the US, just like you can not purchase 11x14 in Europe (or at least that is the impression I have). Now I understand that in the US 11x14 is considered standard and in EU 12x16 is, but it must cost quite a bit to cut paper in these 2 different size for each market...sure seems like it would save companies and consumers $ if there were more standard size.
Not an answer at all, but just something thought I would offer for folks to consider.