" $GOOG (27%) and $FB (33%) captured 60% of $87bn in mobile ad dollars in US in 2019. Unlikely any growth in 2020, down from previous $105bn estimates. COVID won't reduce market share of $GOOG $FB; if anything, w/ $AMZN, it may increase" (4/22/20) https://t.co/XVxwnTL7Hs