If you look in the link there are six games listed. One is Star Citizen, two are (afair) by Amazon game studios, so that would leave three other games. No idea

If you look in the link there are six games listed. One is Star Citizen, two are (afair) by Amazon game studios, so that would leave three other games. No idea if these are just the show cases or all of them. 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.