It's not true! They're using it to advertise other contest referred to as "Trade and Win Contest" whereby you fun your account and then trade certain number of lots size to win. For example, to win a laptop, you have to trade 600 lots (can give the broker about $6000 gain).
Also to win a car you have to trade 20,000 lots, which can also earn them $200,000 gain.
Well, it's a good business for both the broker and the trader. It's good for traders with a large capital.