> I mean are they being forced to do it and not being paid for it
Slavery is forced labor, which is orthogonal to being paid. If you are forced to work but are also paid (perhaps rare, but not unheard of), you are still a slave regardless of the pay. If you aren't being paid but aren't being forced to work, you aren't a slave (that's called volunteering.)
Slavery is forced labor, which is orthogonal to being paid. If you are forced to work but are also paid (perhaps rare, but not unheard of), you are still a slave regardless of the pay. If you aren't being paid but aren't being forced to work, you aren't a slave (that's called volunteering.)