They are person or company leasing labor aka providing services. The other items I listed were both services and goods.

The point is that you shouldn't force a platform to employ or act as anything other than what it is (a routing system). Uber is not directly employing people, it's connecting customers to produces of a service (taxis, effectively). It's also acting as the payment processor and price setter. Everyone can know what they're getting / paying ahead of time. It's a transaction.