What's "Amazon integration"?
And why is Amazon developing a game engine?
And why is Amazon developing a game engine?
Unity and UE4 really are the current leaders in game engine technology, CryEngine, while great, has suffered in the last four years or so and isn't a significant competitor.
So, not the greatest uptake, but Amazon was always willing to give things time to mature. We'll see if they can take market share of UE4/Unity.
Because of the Amazon services integration potential. That's how they make money.