Seventy grams per square metre is the weight of a free newspaper. It creases if you look at it, yellows in a year, and shows the ink from the other side. It is also cheap enough that we can print three hundred copies of a pamphlet and post them for less than a single glossy run would cost.
The paper is the argument. A pamphlet that costs nothing to make can say anything. Pamphlet 09 sold out in eleven days and we are not reprinting it, because reprinting is what glossy does.