I did a historical search of articles using: "uber on the promise of gig economy" and cutoff articles after 2017
First article has a paragraph that is fairly representative:
https://hbr.org/2016/11/what-motivates-gig-economy-workers
> One of the promises of the gig economy is that workers have more flexibility to work when and as much as they want. That’s why many people start driving to earn extra income outside of their day jobs or in their free time. Hobbyists represent an illustrative segment of part-time drivers in the ridehail workforce. These supplemental earners are comprised of retirees, working professionals, and empty-nesters. Their primary motivation to work is often social. My research suggests that they benefit most clearly from Uber’s employment model of independent contract labor, as they gain more opportunities for marginal employment and are less vulnerable to the same business practices (e.g., rate cuts) that prompt strikes and protests from drivers who rely on Uber as a primary source of their household income.