And FavorDeal is one of them. I won from this company on a blog a few months ago, and I haven't received my prizes yet. I sent them a few e-mails, and they always keep telling me that they will send the prizes soon with a tracking code. But it never happened. It has been 3 months :(
I heard that they also send their customers' orders too late. You can check it through their Facebook page. A lot of people complain there. They sponsor many giveaways on various blogs, but don't keep their promises. I don't recommend you to buy from or to cooperate with this company, ever!
UPDATE: I finally received my prize, you can check it here: http://sweepstakelover.blogspot.com/2012/12/73-mail-alert.html