I'm in agreement with you that the success or failure of the marketing endeavor is execution dependent. However, I do feel that there is a point to a measurabl

I'm in agreement with you that the success or failure of the marketing endeavor is execution dependent. However, I do feel that there is a point to a measurable loss, namely that you know not to do it again. If you spend a $1000 on setting up a Groupon deal and don't make your money back then you very clearly know that it was bad marketing move. If you spend a $1000 on a radio ad it's much more difficult to know what impact it has on your business.