Heck, if they are so hard up for cash, they could sell weapons and armor! That way, the good guy would get indestructible gear, the cause gets money, and everyone profits. But, instead, in order to get MORE money for themselves, they go with useless decorative objects to adorn the palaces of the wealthy. Egwene consistently finds the worst possible ways to apply wonderful new things.

If I remember correctly they can't actually do this. The third oath is to not use the power to make weapons, is it not?