This is actually a few interesting question, because, when done right, marketing can essentially be a tool for pumping dollars back out of the equation. If you’re running a pay per click campaign for example, if you are in the right market and have the right product, as well as the knowledge to run that campaign, you can have everything in place to be putting one dollar in and getting two dollars back.
A 100% return? Heck, most anyone would do that, over and over and over again for those profits. So, yes, to answer the original questions, marketing can be a wonderful investment, if you have the knowledge and expertise to make it work for you. Luminance did a poll and most people don’t actually view marketing as a financial investment (what a shame, right?).