All scheduled domestic positioning is done via comml deadheads. Reserve crewmembers may deadhead on company aircraft (typical) but if they are substituting the commercial portion with a ups deadhead, their travel bank is credited with 62.5% of the commercial ticket value. The "work with" fare for the pairings can be used to deviate and 62.5% of any money saved goes into your ticket bank for use within the next 4 bid periods (all but one are 56 days long). So effectively, you get the use of ticket bank for at least 6-7 months.
Hope this helps.
Pilot7576