adding content to a browser game (and thats what it is, whatever you say) is the only thing the devs can do to keep it alive and earn money from it. thats the idea behind those games, maybe you didn't know
if you say the content of the game is static then you can say that for nearly all other games too, not only browsergames. i know that there wont be a drastic chance in gameplay but i didnt ask for that, i need more content and thats what a lot of player want (ask around).

atm FKG is my #1 game i spend money an time at, and that will last for some more month i think