Any comments ?
Not to mention FB, which is 100% an ad company, and wants to stick to this juicy business model (see how they have refused to own the "fake news" issue by denying being more than a tech platform, and how they are downscaling on media contents, to favor your friends and family posts -supposedly more addictive and therefore more attractive to ad publishers). Amazon is already a vastly diversified company that can make so many moves in so many more directions towards an always more integrated, centralized and ultimately fully controlled value chain. This is a much more robust position than FB and Google.
Ultimately though, I believe FB is more exposed than Google.