Because cable advertising sales reps take you out to lunch, give you box seat tickets to NFL games, and create all of your reports for you. Which is even easier.

Also, some people measure their self worth on the size of their company's ad budget. And those same people tend to have stupid amounts of money compared to their childhood peer groups.

So buying ads is like adding a set of metal balls to a truck hitch. Revenue was never the point.

Also, a lot of entrepreneurs have short attention spans and constantly change things out of fear, taking it from easy to do well to impossible to know.