UK supermarket Sainsbury's will today [Tuesday] launch a multi-million pound giveaway competition, which it hopes will bring more shoppers through its doors. For every £25 (US$36.5) they spend, shoppers will be given game card that will have a one in ten chance of winning a prize. Top prizes include 25 Peugeot 307s, while 50 customers will win a year's free shopping. Everyday prizes include selections of food and drink. The total value of the prizes is £3m.