You obviously have never been poor and have never had to live off minimum wage. Most of what they are talking about in this article are the cheapest forms of entertainment that are available. Your own misconceptions of how much is spent on this stuff is blinding you.
Poor people don't buy fancy new HD TVs from Best Buy, they generally buy the coolest thing they can find at a Pawn shop or a Garage Sale, or some other second had place that may or may not be legitimate. It is quite possible to get nice stuff this way without spending even moderate sums of money on it. I know you probably think you are too good for it, but try walking into a Salvation Army some time and look around and see what the prices are, or maybe a Goodwill somewhere.
Once you've done that try comparing those prices to the cost of other forms of entertainment and see what you get. I'm sure you think that poor people should be limited to staring at the walls in the dark for a while while waiting for time to pass to go to bed for work the next day, since being able to pay the electric bill is probably "blowing your money on shit you don't need." Especially since poor people generally live in crappy apartments where the power bills are much higher due to inefficiency.