To my knowledge most time share presentations do not reward the attendee with completely free accommodations for 3+ nights.
I've never completed one of these shops as they don't interest me. I've briefly scanned the overview but never invested time in the actual guidelines. I own Disney Vacation Club and choose to vacation via those points.
I was out of town last summer, traveling to Wisconsin Dells for 4 nights (NOT vacation). I looked into a time share presentation to help defer my hotel cost for the trip.
1. I did not find one that offered a free room in exchange for attendance.
2. The discounted rate was only for a few nights, not the length of my stay.
3. The availability was super limited, I wasn't able to book a presentation offer even though I called about 2 months in advance.
Maybe my experience isn't typical as I've only this one experience to base my opinion on.