WHat you are talking about is a Kodi box, in the description of the box in the OP I don't see it being sold as a hacking device, they state in several places that you may need to pay a subscription. Here is the text of the product from the website:

"The ISTV Box is Apple TV, Amazon Fire TV and Roku on Steroids.
Featuring the most advance TV box processor and a whopping 16 Gigabytes of onboard memory, Buffering issues are part of the past,
The Ultimate 4K ISTV Computer TV Box Where Smart People Go For Entertainment.

Make your cable or satellite even better by streaming your favorite channels, including full libraries of seasons and series.
The ISTV box makes it easy to stream just about anything.
Movies, TV shows, live sports, news, and music. Blockbusters and broadcast TV, big entertainment brands and niche channels. Watch free or paid subscription content, or choose to rent or buy. It’s up to you.
All you need is a High Speed Internet Connection, and you can instantly start streaming everything to your HD Television from your favorite apps like YouTube, Netflix, Hulu, Crackle and thousands of websites around the Internet. You can also surf the Internet, Check Email, Facebook, Skype, Sing Karaoke, play games and listen to music from the comfort of your couch.
Using the android platform, you can download thousands of apps from the Google Play Store.

The ISTV Box is a mini computer as well, now you can sit on your couch and use your TV as a large computer monitor.

A paid subscription or other payments may be required to access some channel content. Channels are subject to change and vary by country."