I used to work for a delivery company with this same pay structure. This is garbage and its taking advantage of young people who are looking for jobs.
Serious question: if somebody knows that a job like this is such a ripoff (even if the rates aren't advertised, you _will_ find out soon enough, if via stories like this), why would somebody take a job like this?
People that are desperate for money are frequently exploited. Whether it's through wage theft, or unsafe employment practices, or simply demeaning behavior.