Gifthulk.com is paid site where you earn Hulkcoins that can me exchanged for gift cards including pay pal, Amazon or other store vouchers.
Internet Searches - random amounts allocated for random searches and if you use the toolbar you could also get $1 amazon gift cards
Treasure Chests - you get free keys everyday for a instant win game and if you win you can get HC, bonus percentage boosts on earnings, store discounts and $5 gift cards
Watching Videos - 1-5 SB
Polls - vote and get 1HC
Playing Online Games - enter the tournament = 1st/75 HC - 2nd/50HC - 3rd/25HC
Surveys - random amounts from about 16HC on completion