'The renting economy' just doesn't have the same ring.
They have nothing to do with the local community, in fact a global taxi firm degrading workers rights couldn't be further from this.
By this definition, virtually nothing is sharing beyond maybe volunteer operated community gardens. Virtually every service involves some sort of middle men getting a cut. Even a volunteer run community garden would if gardening supplies are purchased rather than wrought from supplies indigenous to the land.
(In contrast, traditional taxis do collect rents - the delta between a medallion restricted taxi market and one without barriers to entry.)