https://www.siliconvalley.com/2019/11/08/instacart-shoppers-say-company-retaliated-for-walk-off-by-cutting-pay-two-days-later/

A group of workers who shop and deliver for groceries-to-your-door giant Instacart say it retaliated with a country-wide pay cut two days after workers held a labor action over tips.

From Sunday through Tuesday, many of Instacart’s army of non-employee shoppers stopped picking up and dropping off customers’ groceries, in a protest intended to get the San Francisco company to restore a default 10 percent tip option on the app from the current zero to 5 percent in place since late last year. Some of the rebellious workers also disrupted the company’s app-based operations through such methods as accepting orders and never fulfilling them.