It's like another Groupon site that is starting up. Normally these sites have great deals when they are first starting out, so jump on this one before it runs out!
First register yourself HERE.
Then GET the Target gift card.
Then email 4 (or more!) of your friends to tell them about Plum District.
If four friends sign up through your link (not make a purchase, just sign up!) they'll send you a Target gift card!