That's not how markets work though. If someone is willing to do it for free, and you are happy with what that person produces, why would a company pay them anyway?

> why would a company pay them anyway?

Because we have laws to protect workers. You can't just not pay an employee and call them a volunteer as a for profit company.

There a legal limitations on what a for profit company can do with volunteer labor but companies have been increasingly bold about pushing those limits.

Often times it is hard to tell if a program violates those limits since particpants are put under strict NDAs.