I'll admit it's a little annoying, but eventually the update is free. What I've see na few devs on this site do is make an entirely new page for their game when they update it, which makes it so you would have to pay a second time just to get the new update, and they do it for every update.
Viewing post in Knightly Passions [1.21 version] 18+ comments
And I very much appreciate that. I'll just occupy myself with other games until updates are available. And honestly I like the game so far, the art is really nice and I've always been a fan on the card battle system. Can get a bit grindy at times and there's a lot of fetch quest like stuff, but it didnt bother me to much, was still enjoying myself.