Most of these providers are looking to lure people into their service with low prices and then jack the prices up 6 months later. Every one of these video providers are priced similarly after their promotional pricing is over.
Speaking of which, Dishnetwork signs you up for a great price, for the FIRST year, with a TWO year contract. So then after the first year good price expires, you're forced to stay with them for the second year, with the higher prices (same as everyone else's price). Read the fine print people --- no excuses.