How CitiBike (NYC) crowd-sources bike distribution (opens in new tab)

I would think they would have to go to a variable-reward model, like "surge mode" in Uber, where major shortages/overages require added rewards.

I enjoyed this explanation of crowd-sourcing, especially the featured angel I see that does exercise with this: "I'll bike north in Central Park to an empty station, then run back down the park and repeat a few times."