The trick is, the advertisement was " Insert $3 ( your real money, whether it is One 2$ note & $1 coin, or no change, two $2 notes), you get a box of _____ you were expecting? $50 worth of vouchers to buy something. Just like the SG50 kopi tiam card trick, they give the oldies the top up card , you get $3 off any meals; so oldie go Changi Airport basement food court ( back then) to claim the $3 off a meal..the best part, Card has no value...have to top up $10 to get $3 off...ha ha ha ha. These people learn from the best...ha ha ha ha