I've wondered this as well. I think the idea of a small-team open source project funded on KS in milestones is feasible. However, the promotion would need to be

I've wondered this as well. I think the idea of a small-team open source project funded on KS in milestones is feasible. However, the promotion would need to be handled by the community and backers vs the developer team. Otherwise the time and monetary cost of frequently running campaigns on KS would be too high of a distraction. I also think there's room in the market to create a KS alternative specifically for software that actually helps with promotion.