Here are a few steps to a successful game

Step 1-Make the game and test updates and events prior to their release

Step 2-Release the game, and take in public feedback, fix any found bugs by the community and try to polish up the game with the feedback you receive

Step 3-Be honest to your community and don't just lock yourself away, that tends to create mistrust if you don't communicate with your community

Step 4-Eventually release a new expansion, make sure it has everything in it, don't leave out 1 or 2 things. Be sure to test updates

Step 5-Be reasonable, don't do anything too shady!

Step 6-Profit in more then 1 way. (Money+Great community, may end up with even more money due to others wanting to play a great game!)

(Also, don't be afraid to throw Hiruzen back in the five kage treasure...yeah...that bug..... I'm just kidding! :D)

Also, +1 to this topic's ideas