well, they are parting with boutique juices that retail around $20+ each... so It's a great deal if you are a person who would want that juice anyway... sounds like they are covering some kind of cost, or at least offsetting it... I wouldn't accuse them of trying to scam.
Personally, I'd pass, because I don't care for those brands...
What I think is shady is telling people they won when in reality its more like zamplebox where you pay a fee and get juices each month. You aren't really winning you may be getting a deal, but you aren't winning. Winning means totally free. I've won things before...no charge. I've supposedly won things from places that wanted my credit card number for different reasons. I refused because winning anything shouldn't cost you a dime. This business should say exactly what they are doing... Not pawn it off like winning a lottery.