Instacart made an adjustment to how they pay workers by keeping tips and compensation separate. Previously, tips made on the Instacart application would not go directly towards the worker as it was being used to offset the minimum payment per job. Additionally, if workers make over a certain amount in tips then they would be paid less. Workers expressed their concern over the pay system and as of yesterday, Apoorva Mehta, the Chief Executive Officer, announced that a new pay system will be in effect. The new pay system will raise the guaranteed pay for some jobs and will also compensate workers for previous jobs in which their tips were used to offset the minimum payment.
See "Instacart Adjusts Worker Pay After Uproar Over Tipping Policy", Ellen Huet, Bloomberg Law, February 7, 2019