PayPal is not a bank, AirBnb is not a hotel and plenty of drivers will freely serve rides from Uber, Lyft and a variety of other ride sharing services; they aren't "employees" of any single firm. (Of course they must serve a single ride at a time for sensible policy reasons, but aside from that they're quite free to pick their favorite ones.) These things actually make sense, even though they might not be what you're directly used to.