Slickdeals.net or Desidime.com , Dealplus.com using Wordpress

i want to know the best way to design or clone website like slickdeals.net , desidime.com , dealplus.com any one of it . i checked few themes like couponpress.com ,couponxl, couponer but not able to get that kind of functioning . please tell me wordpress theme and plugins which we can use to get the functionality . i want the user to check the deals and also they can discuss it, add each other as friend , they get points when they share any deals ,vote the deals etc

One other site is freekaamaal.com which is using wordpress .