Marketing is not just about spending money.
It is about having an end-to-end strategy starting from the offer, to the funnel, and to the traffic. If any of these elements are out of place, you will fail to attain the results that you desired. However, if the three are aligned, the results will compound and exceed your expectations.
A great offer that sells by itself, a funnel to increase the order value, and the right traffic source to the right audience.