[tyfon]

I work in the financial industry and even if the CAC is really high (100s of dollars) it still pales in comparison to the income we get on average from the new customers.

I don't work in marketing but even if I personally hate ads, they unfortunately work really well especially in combination with facebook/googles profile on everyone and the fact that they seem to learn who clicks a certain ad after a few days and only display it to that group.