If you want to leave a generous tip for your Uber driver, you may have to use cash because the ride-hailing app has a ceiling. Lyft has tipping limits, too. Dara Kerr was a senior reporter for CNET ...

Dara Kerr was a senior reporter for CNET covering the on-demand economy and tech culture. She grew up in Colorado, went to school in New York City and can never remember how to pronounce gif. In late ...