In some sense, he is right. I am an accountant. We have several clients who will buy equipment they don't need yet and basically do anything they can to shrink their profit. If they can shrink their profit they can shrink the amount of taxes they owe at the end of the year. If Dish is having a good year they can pour more money into R&D and try to come up with new technology. Showing $5 per customer in profit doesn't mean that's all they are making off each customer. It means that is all that is left over after executive bonuses and whatever investments they choose to make with their excess revenues. Operating income gives a better idea of how much money they make per subscriber before all the tax shelter moves are made.
Now a lot of that money they spend on R&D and things like that is necessary if they want to keep moving forward. Plus, a low net profit might be good for tax purposes but that doesn't mean that it's the best move for your shareholders. Corporations have to do a balancing act between keeping taxes down and keeping profits high enough to keep the shareholders happy. Shareholders want dividends and you need profit to pay those out.
Edit: Their operating income for the 12 month period ending September 2013 was $1.32 Billion. Now, I'm not saying that Dish is doing anything wrong here or that they are trying to hide excess income in those periods listed. If you look at the website I listed you will see that their operating income is lower than most of their competitors too. My point is that Mike is right in that companies have some wiggle room to change what their net income looks like. Saying they only make $5 per customer so they can't discount probably isn't accurate. For one thing, that average includes new customer promo pricing and other customers who are getting discounts.
http://www.wikinvest.com/stock/Dish_Network_(DISH)/Data/Operating_Income
Thank you for understanding my point and for explaining this better than I could. I had two semesters of accounting back about 24 years ago in college and we talked about a lot of companies and their creative accounting . The professor said pretty much what you have said about many companies ,but it has been so long since I had to explain it.