What's attention worth?
Marketers that fail are often impatient and selfish.
Impatient, because they won't invest in the long-term job of earning familiarity, permission and trust.
And selfish, because they get hooked on the erroneous belief that merely because they have money, they have the right to demand attention. And selfish because they believe marketing is about them, not the person paying attention.
We call it "paying attention" for a reason. It's worth quite a bit, and ought to be cherished.