Why? I imagine that data for ML is sort of a logistic curve of benefit, and that Amazon's assorted sources have them "on the plateau", even if not as high as G

Why? I imagine that data for ML is sort of a logistic curve of benefit, and that Amazon's assorted sources have them "on the plateau", even if not as high as Google. There's good reason to expect that we'll see several major players in ML/AI, just like we do in pretty much every other market.