Amazon will continue to see ad spending growth in 2020. Business Insider reports that Amazon's growth is at a depressed rate when compared with eMarketer's earlier estimate. Amazon will increase its U.S. ad revenue to $13 billion this year. Thats a growth of 23.5% when compared to 2019. According to Business Insider it's important to note the $13 billion estimate is less than what eMarketer had predicted before the coronavirus outbreak. How much less? About $920 million less.