I’m here with an idea for the open public API of your game, stuff inside. Have you ever considered that? Have you seen what can be brought in for the game in the matter of stats and other valuable information, when the community contribute? You might want to have a look on e.g. API Challenges made by Riot Games about their game League of legeds.
How interesting might be to watch the guild raise from the ashes to the top or slowly declining towards the forgotten realm, when nobody wants to be part of that guild any more. How about statistics about the PVP’s - what is used most for defence, what is used the least, and what is the win rate of each of the card in the specific combo, overall?
I bet you have all this data sitting somewhere and maybe you are watching those (as seems by the last post of the new week reward and the stats about goblins), but might be interesting to release access to some of those to the big bad world and see, what it will bring.
Cheers and best of luck,