Selected users are matched up with products, aka VoxBoxes, that are sent to them free of charge to review. Each review has a variety of tasks that need to be completed through various social media outlets. The more tasks are completed the higher the probability that you'll be selected for another campaign/product review.
I've been a member of this site for less than a week and I've already received my first product to review. More on this later...I'm still in shock,
It's not a bad deal for 15-30 minutes of your time every few days. So if you don't mind flooding your social media sites with product reviews than this could be for you.