This scam is so beautiful. Old but so simple and so neat.
Usually you send snail mail to X (a large number) target with a prediction (who win next match). Then a new mail, to half the people. The one you sent a correct prediction to.
After a few more "prediction". You end up with one person who received every correct prediction for the current sport event.
Then you ask money to give your prediction for the next match.
It's a shame internet make it simpler, but scammer don't do it for money anymore. Just to get some followers/like/upvote... kind of sad.