The above offers are currently available free of charge just for being a Chromecast owner. Most notably is a free movie rental from Google Play. You can choose from thousands of titles and start streaming right away. All you have to do is make sure your Chromecast is plugged in and running and visit the Chromecast offers page to redeem your free movie.
If you don’t have a Chromecast yet, or if you’re looking to expand to another TV in your houseyou can get one refurbed from Groupon for $18 ($20 minus $2 w/code HOT3) + $3.99 shipping (unless you buy $30 more in good at Groupon), also Amazon has a new one for $29.99 Prime shipped.