Dave Levy and Nikos Kanelopoulos are trying to beat the algorithm. The two DoorDash drivers—Dashers, as the company calls them—are trying to persuade their peers to turn down the lowest-paying deliveries so the automated system for matching jobs with drivers will respond by raising pay rates. Their main tool is #DeclineNow, a 40,000-person online forum that provides a view into a type of labor activism tailored for the gig economy.