Brokerages that hire people without a license to start

[Joseph M.]

I've noticed that quite a few brokerages say they will hire someone that doesn't currently have a license but is working towards one. 

Just curious about how this works since you have to be licensed in order to legally receive a commission right?

Do they basically offer training and some kind of minimum pay until one receives the license? Or do they just not pay at all until one is licensed? Most of these job listings don't seem to have a salary listed.