MGM opened on May 1, 1989, over 2 years before there were ANY free passes for
DVC purchases. That park was included in the Limited Admission Program from the start. AK was not included - except for the day the other parks were closed due to Hurricane Flloyd and they did accept the DVC passes that day.
The Park admission program was always scheduled to end on December 31, 1999 so there was no surprise about the program ending. While the passes were issued to OKW and VB owners thru 1999 (while staying at OKW), it was never offered to HH or BWV buyers as an incentive. The sales incentive ended before HH opened and was available to OKW and VB buyers until late 1995.