I know that DISH, DTV, FIOS, Uverse...etc...do the carry some channels that others don't. I've done to much research.
Truth be told. You guess it, I didn't subscribe, my wife did. I was happy with my OTA antenna with my ION in my area that's channel 68-1,68-2,68-3. I thought it was interesting getting the addition channels because no one what wanted to use all the bandwidth for 1080p.
Nickle and Dime charges...the receiver, the channel tier, the movie channels charge, the dvr charge, the whole home dvr charge, etc. I go over this bill online with a microscope.
I'm riding DTV hard because I thought that they charge more than anyone else because they were on the bleeding edge with channels and latest technology.