I came across this thread while looking for options to watch the RedZone channel without paying for Sunday ticket. I called the DTV Customer Service 800 number and responded cancel and close account to the prompts. When the CSR answered I just said I was "calling to see about getting just the RedZone channel by itself". She had me hold for a few seconds then said No problem and activated it immediately at no charge".
I was skeptical that this would work for me because I just signed up for a new two year commitment in Oct 2012 to get the full Sunday Ticket Max for free, so I figured I'd be flagged this year as some previous posters mentioned.
So to anyone hesitant to call, it's worth a try. I've been enjoying RZ all day today and will be all season for free...well worth the 3 minute phone call!