Nice analogy. Ever see a common urn? Square? Squat? Ugly? Bland? Dull?
Cost? Less than the competition and the market has proved over and over that people planning a funeral are either pre-planning their own or in shock over the death. At least they will have a choice now where there was none before.
Want a free burial? Have your ashes spread somewhere (even though it is illegal most places) but you still HAVE TO PURCHASE AN URN...
I see a loved team resting place, a beautiful religious symbol symbolizing everlasting life, a resting place for a loved child....
Besides, the inhabitants will never complain. :)