Support and community management are less scalable in the sense that the relationship between user interactions and time needed from staff is fairly linear. Each one is therefore less valuable, but collectively (no pun intended) essential when there are other, hungrier alternatives.

At it's current stage of maturity, the Kickstarter platform needs maintainers (SREs, Security, etc.) and staff to interact with creators and backers. I don't know to what degree new features or efficiencies will help Kickstarter become more profitable on 5% than it has been since 2010 - the product is essentially the same.