Ok first let me say this may not even work or even happen but I still have to suggest it because you never know what might happen.

My newest idea is to award people for either submitting ideas or their ideas make into the game.

1.Awarding people for submitting ideas. = this idea is a 50-50 percent chance of happening
really this is pretty much explains itself it that people should post ideas so they in a little way own this game like it is theirs because really if no one ever posts ideas or thinks up of new ideas to bring this game along this game most likely will go under and everything people spent money and what not goes with it.
Also really having this happen will make people want to post ideas and get their creative juices flowing and posting where everyone benefits from it in the short run and the long run.

2. Awarding people for having their ideas make it into the game. = this idea is 75 - 25 percent chance of happening
really this is pretty much explains itself it that people couldn't just post **** ideas and get awarded for it in that their ideas would have to see the light of the day or see the light of the tunnel not have that light of the end of the tunnel be a TRAIN.
also by rewarding people for having their ideas make it into the game and others found out they got handsomely rewarded for their ideas would in turn make people take a participation in posting ideas and seeing the fruits of their labor by getting rewarded.