Fractional ownership programs I have seen often seem to have a relatively small hour allotment. For example, a typical arrangement might be a 16 way ownership with 50 hours each. So that is a total of 800 hours per year for all the owners.
Of course, a calendar year has in it 365 * 24 = 8760 hours in it. Which means that less than 10% of the available time is allotted to the owners.
Even if we allow 1000 hours for positioning and 150 hours for maintenance and 250 for cleaning and prep, that is still only 2200 hours total, about 25% of the available hours. Let's further subtract 10 hours per day, or 3600 per year for "late night" hours that people would not want to fly. We still have 3000 hours unaccounted for.
What is going on here? Do fractional operators cheat the owners by chartering out those 3000 extra hours? What is happening to those hours?