I play on server 87 (Anubaris) and have a Castle Lvl 19 at the time of writing this post. The server is less then 2 weeks old and it's already dead. Most top players from other kingdom saw how my house was dominating big/giant cities and even managing to fight off most kingdoms at the same time so most decided to migrate into our kingdom while they still could. Now we are the top house by almost 2x the amount of power compared to the second best house in the server.
Other kingdoms are losing players constantly as they have no chance to migrate anymore and just quit the game or joined the newest server that appears every day or two. Now my house is stuck in nearly a dead server where we completely dominated and have no competition. What is there to do? Kill the remaining weak ones? Then what? Daily PVE only? I don't think that is enough to keep players active or spending money on your game. There needs to be more actions/events (more caravans based events too) specially larger maps with a lot more players as right now a 2 week realm is essentially over there is just no content left.
How is it possible that the developers keep introducing new servers daily and there are past servers that only last two weeks? At this rate people will get bored and not even play your new money-hungry servers if you keep the old ones dead.