Anime Strike just got absorbed into Amazon Prime. What high profile series just opened up there?
Decided to search again. The first time I searched on their site with "prime video anime", there were 400 result pages.  I just searched again, and it is giving me 20 pages of "most relevant results". Here are some series that stuck out for me:


Land of the Lustrous
Re:CREATORS
Welcome to the Ballroom
Dive!!
The Great Passage
Made in Abyss (retyped here so they in one spot)


These are recent series I don't remember being available on Crunchyroll or Funimation in the USA. 

// 6 Jan 18
A new YouTube video posted today which includes mention of a lot of good Amazon Prime titles, even ones not super-recent.  See Ding-Dong! Anime Strike is Dead. What Now?