Presumably extras would be advertising/"attention-economy"-driven and thus subsidized by another company rather than the drivers themselves. Or if Uber let driv

Presumably extras would be advertising/"attention-economy"-driven and thus subsidized by another company rather than the drivers themselves. Or if Uber let drivers have mini vending machines there's a clear ROI on a relatively small investment (or the vending machines are rented etc). Perhaps the more expensive "black cars" would have freebies.