Scott Galloway presents the week's biggest winners and losers in digital:
Loser: Hotels, as Airbnb takes an increasing share of their guests - despite the company's claims that its service is "complementary" to the hospitality industry.
Winner: Best Buy, which bested Amazon in search visibility for Black Friday.
Loser: Brands that depend too much on celebrities. When Kendall Jenner took a break from Instagram, Estée Lauder lost a huge chunk of engagement.
Loser: Second-tier pro athletes, whose low wages are yet another illustration of what the winner-take-all economy has become.