Here's another stats scam.
Find a 4 horse race run once a week and place the names of each of next week's contestants in 4 sets of envelopes and post one of to anyone (the more the merrier) that bets.
Next week when you know the winner of last weeks race do the same with this weeks entrants but only send them to the addresses that got the winner last week.
Repeat until you have a handful of punters that think your psychic and charge them £100 for the next winner, post off the letters and leave town before the race.
You need to start with a sizable group initially as it reduces to a quarter every cycle.

PP