I thought that's what you meant. How about giving an example of a 2% and one of those 5% edges? In the 90's I remember slot clubs with 2%-3% cash back. Plus full RFB was the thing of the day for years (until 5-7 years ago?) for dollar and even heavy quarter players. We also got showered with gifts, day trips, cash drawings where regular people actually won something, etc. Then there was the $5 8/5 BP machine at the Luxor that only required 3 coins to play 5 credits. And irregularities like that were found more often than they are today....and without the ability of handheld gadgets to ruin them quickly.