There will always be a set of users who are only interested in maximizing their own short term rewards, even if it comes at the expense of the long term success of the project and community.

There will (hopefully) always be users who see that by doing what is best for the long term success of the project is the best way to profit.

I believe that as long as there are enough users in the second camp (which I do believe there are) then we will succeed.