What to rent a video without it costing anything

Interesting site that lets you earn rental money via watching commercials.  It has allot of Q/A in the commericals so you can’t just let it run in the background.  The author says it takes about 15-20 minutes to get enough “credits” to rent a top movie off amazon.  My 2 cents, I would rather work, but if I don’t have an hourly job, or if you have kids that want to watch something, this maybe a good way to go about it.

http://lifehacker.com/hitbliss-lets-you-earn-money-for-movies-and-tv-shows-by-1537717190?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+lifehacker%2Ffull+%28Lifehacker%29