So, I'm sure many of you have seen tipsters on this section, in your Twitter, in chatrooms and some other places - it's the people who suggest you to place bets on certain picks in sports. And maybe some of you have asked yourself a question - why they are doing it? Why they are giving us advises how to win money absolutely for free - and by doing this they decrease their own profit, since the winning pool grows bigger as people follow their tips. Can anyone explain this?