The problem of Taskrabbit is that they could not be associated with one clear repeatable need that people had, which lead to a sub par experience for almost all use cases.

Most marketplaces in this space are pretty "directed" by the Company (Postmates: deliver food, Instacart: delivery grocery, Lyft: deliver people with car, HomeJoy: deliver cleaning ladies).

Lyft is a good example of a P2P system that worked when everybody before them failed because Zimride "directed" the marketplace when all previous tentative where about "grab people on your way to work".