I was reading this page the other day - forget the actual article - scroll down until you get to "A GUARANTEED PROFIT OF" which is about halfway down the page.

What this system does is basically hedge betting - you bet on all three outcomes of a given football game;

Team A to win
Team B to win
Neither win

1 of those three outcomes has to happen. So what you do is bet on each, making use of different betting firms. You can read the example given in that page.

Seems to be money for doing nothing, if you are into betting.

Note that I have not given it a go, and I am not recommending that you do so - I just thought I would highlight this sort of thing as a way to make a guaranteed profit. If you do decide to have a go, let us know the results of your bet?