Maybe it's to do with social network advertising? (https://marketingland.com/almost-70-of-digital-ad-spending-going-to-google-facebook-amazon-says-analyst-firm-

Maybe it's to do with social network advertising? (https://marketingland.com/almost-70-of-digital-ad-spending-going-to-google-facebook-amazon-says-analyst-firm-262565 https://marketingland.com/almost-70-of-digital-ad-spending-g...) I have no knowledge in this area, so just throwing it out there for more informed minds to fill in the blanks.