Generally one or two contributors are breaking their balls doing all the work and due to a schooling created desire to inpress others are just being taken advantage of.
Then thousands of freeloaders and cheerleaders riding on their back who are not even willing to donate $2 to the project demand more and more shit
Eventually the contributors eventually burning out and seeing how stupid the entire thing is (I.e no longer caring what these people say or think of the project) and the project suddenly gets abandoned
Two dudes creating something from a place of ego satisfaction and thousands of cheerleaders taking advantage of them is not a community