Instacart workers, complaining about low wages, are organizing a boycott of the grocery fulfillment service among consumers next week to pressure the company to reinstate their default 10 percent tip. “On Monday, January 19, we will be asking customers and the general public to tweet at Instacart, and tell them you stand with their workforce, and that you’ll #DeleteInstacart until they restore fairness and transparency of pay,” worker activists wrote in a Medium blog post.