“If customers knew Instacart was using their tips to lower the amount the company has to spend on labor, they would be furious. That's the customers' hard-earned money — they're trying to use it to tip workers in addition to Instacart's pay. They're not tipping so Instacart can pay workers less, they're tipping so workers can make more money. But Instacart is using those tips to pay wages, and it's not OK.”