Weird Promotions

I got a card from Victoria's Secret after buying something at their semi-annual sale.  It was a secret reward for either $10, $50, $100, or $500 to VSX, their athletic apparel branch.  That's fine and dandy, but the restrictions for the promotion were stupid.

• only applicable on full priced merchandise (no thanks, I don't need an $80 athletic jacket or $25 tshirt to work out in)
• can only find out how much the card is worth at the register

One, I would never buy anything full priced there even if I had a $10 off coupon.  Still overpriced!  Two, this can only piss off employees.  You'll have cheap bastards like me walking up, finding my card is only worth $10 and changing their minds about buying their items.  Sorry.

What's the harm in finding out before you make a selection?  I mean it still gets customers into the store and that's the hard part right?  Maybe they'll find something they weren't looking for and buy it.  I know this customer is not going to be purchasing anything there anytime soon.