Download an older QPS layout (Shockwave, Cash Lab, Shock n Roll, etc.) and watch how it pauses when you press start on the last credit for it to roll in a 2, or 2 feature symbols most times. Yes I do reckon it happened in the past. I also believe that the GC have prevented this sort of teasing code to be implemented in newer games. However, the machine can just nonchalantly tease spin after spin after spin regardless. If it teases 75% of the time normally, one cannot prove it is rigging that last credit.