Earlier quoted context omitted.
Imagine being locked up for not paying fines, only to be fined further while your in, and unable to break the cycle...
Right, that’s not great, but that’s not what people mean by debtors prison.
If someone is unable to pay their debt, they are thrown back in jail, accruing more debt. How is this not a debtors prison? Perfect examples are listed on this wikipedia article. Child-support, garnishments, confiscations, etc. It's exactly what I described.
https://lasentinel.net/if-youre-poor-in-america-debtors-pris...
Inmates who are unable to pay their fees (for even being in jail) are unable to leave. For-profit prisons are real.