Some online services (e.g. Doordash) which ask you to pay a tip upfront even before the service irrespective of the quality. And, the default option is pre-selected to 15% of the cost on the checkout page. This after a specified delivery charge, and some "fees" bundled along with taxes etc.

And I read articles about how companies like Doordash are not making profits and are riding on VC money. It is just passing the buck onto the customers to keep their uneconomical business models afloat.