The way I read the article, the author is pointing out the sneakiness of 1. conflating service with tipping, and 2. hiding an option people assume isn't adjustable (who would think you could waive a service fee, and what normal person would want to pay a ~higher~ service fee? note that service fee vs. tipping has different connotations) behind a nav.
There certainly is a understanding problem here, even if the individual components are all familiar, because it's not at all clear what tapping a chevron on a "service fee" would do anyway, and it's certainly far from default to assume that that's how you would tip, especially if you were unfamiliar with Instacart, and didn't realize tipping is a thing.
There certainly is a understanding problem here, even if the individual components are all familiar, because it's not at all clear what tapping a chevron on a "service fee" would do anyway, and it's certainly far from default to assume that that's how you would tip, especially if you were unfamiliar with Instacart, and didn't realize tipping is a thing.