Shopkick: Free $2 Target Gift Card?

I received an invite this morning from a friend for Shopkick.  It's an app that rewards you for just walking into a store like Target, Best Buy, Old Navy & more!   
Right now they are offering a FREE $2 Target gift card for new users and possibly existing users too. It worked for me!
Here is what you need to do:
* Sign Up!  Just go here to download the Shopkick app.
* After signing up go to your phone's web browser & enter www.shopkick.com/targetsms.  
* Click on "I have the shopkick app" and then enter the phone number you signed up with. 
You should get a message saying your gift was successful & you will receive a $2 Target gift card the next time you go to Target.