Few years back US131 dragway decided for one season to try heads up and index racing. It tickled me because I had raced points up at Stanton in the shootout series up there for like 3 seasons, and it was a pretty good haul. This was 10.0 " real street" class that I was in up there. 4 tenths tree, yada, yada.
Martin ended up having 3 events that year. I was fortunate enough to win all three of them and they paid 600 bucks to win.

At the last one, I went up to the tower to collect my winnings and my check was just 400 bucks. I asked the GM, Jason, why I was getting shorted 200 bucks. He pulled up the website and pointed out where it clearly stated that the 600 was for an 8 car qualified field in Real Street. Only 7 cars had showed up that night, thus the diminished purse.
I apologized, and thanked him for pointing that out to me. When its clear, there is zero room for ambiguity.