| My interpretation of what's going on: CEOs finally have leverage against their marketing departments to do black-out testing on social media ad spend. It's difficult to actually measure impact of ad spending, and marketing teams spin results to their advantage. They will observe what happens and re-introduce spending where it actually works. |
As a test, you would need to control other variables, the present economic uncertainty basically rendered that impossible.
It's just the CEOs finding a convenient excuse to cut costs.