GiftHulk is an earning site that offers giftcards from Amazon, Paypal, Walmart, Steam... to name a few and bitcoins as reward.

The site provides multiple ways to earn:
-tasks 
-offerwalls 
-surveys 
-apps
-using a search engine 
-watching videos
-free games with rewards
-daily and weekly bonus for reaching threshold

http://goo.gl/fWTp3O