It's still their most popular game. Maybe they'll do a campaign with Otogi Frontier since that's brand new on Nutaku.
But we only ever got 3, and the games been out for almost 3 years so it's not really surprising. [x2 Dragon Providence + x1 Taimanin Asagi]
Not having them doesn't really mean anything bad is going to happen to KHP...
Nutaku sometimes do it of their own accord when a new game comes out and they want to promote it by using their most popular game. So don't worry!
omg london buddies1!!!1!