Before my friend moved to Australia he ran a scam on a local bookie that lasted almost a year. He regularry played with a big time local that catered to big square players (not sharps). The local was about seventy five years old and had very bad eyes. At some point my friend somehow got someone he knew to work for the bookie. Regardless of how he did my friend was able to get his figures reversed. So say he went 3-7 his inside contact would change it to 7-3 8-2 etc. About once every month or so they would let the losing week go. I remember him being all pissed off when the book started to personally hold his figures and his bets became legit for those weeks. When his friend resumed holding the figures they decided to set other friends up with the book and ran the same scam with them getting about 50 percent of the profits of each new player they got involved in the scam. At some point his inside guy began to get nervous and they broke up the scam after about a year of what he said was a major score.