Have a comparison between the twitter predictions and the bookmakers odds. Have a 'Place Bet On This Match' link with referral link embedded on each one.
See if there's any affiliate programs you can join as well where there's a "Free £10 bet on any world cup match" and you get a %.
See if there's any affiliate programs you can join as well where there's a "Free £10 bet on any world cup match" and you get a %.