Say you paid the $50 fee, but if an Airlink employee wants to fly on the mainline....do we pay or is like those who work for the NWA mainline except we have lower priority?

Are NWA/Airlink employees ID95 or ID96 on Delta, Continental, or other SkyTeam partners....or are we ID75/ID90 like on some other airlines?

It is confusing to a newbie like me. Any help would be greatly appreciated!