The hailo model seems very different from the Uber/Lyft model. More upscale, so I'm guessing a higher barrier to entry for drivers (and it looks like a smaller driver pool).
I find this ironic. When I used Hailo in Boston, it actually only integrated with taxis then moved to private drives. Uber on the other hand, contrary to what you're saying, started with only black cars then shifted to include taxis, and eventually UberX.