Exiled Kingdoms is complete and with no planned updates. This is not an MMO with a suscription.
Updates may happen at some point, but it will depend on many factors, technical, creative, and others.
For what it's worth, EK still stands as one of my top mobile games. Yes, there's some balancing issues (but surprisingly few?), and everyone longs for more content, but that's a tribute to your capacity to build a world. Every story I have ever read built a world bigger than itself, so that there was much "unexplored" territory.
Thank you for your development of such a great game. It rivals many games developed by whole teams of paid professionals. Indeed, it surpassed quite a few of them...
For the price of a few dollars, you owe us nothing in the current game. If an expansion ever comes out to celebrate an anniversary later, charge us quadruple the current price, and I won't even think for a second. It will be purchased the moment I see it. And I suspect I speak for a LOT of your player base here.
Thank you.