Transactionally, I'm not sure there is any real difference between charging five dollars for something and making it free. BVH seems to really have a handle on that sort of mass sales. But at some point, I don't believe there is enough volume. Simple micro econ stuff. All numbers for illustration only, since price points vary wildly. 10 units at $30 ($300.00, most of it take home) vs. 100 units at $5.00 ($500.00, but $100.00 overhead) vs. 150 units at $1.99 ($300.00 gross again, but $150.00 overhead).