I dont post these in dals becuase I dont see it as a deal, its just a heads up...
Think Bingo is offerin %100 cashback on what you deposit when opening an account (upto £50) however you only have to stake half of what you deposit to qualify.
So if you go though quidco, open a think bingo account and deposit £50, all you need to do is gamble £25 to be eligable for £50 in cahsback.... even assuming you loose that £25, you can withdraw the remaining and get your cashback, £25 profit.
edit: having just tried it, they also match your first deposit, so you get an extra £50 in free bets too
Of course you may just have a lucky day and win on the bingo while your there, so the £25 profit is a minimum..... no brainer if you ask me ;o)