It's going to be a peripheral feature for a long time. It'll be another 5 years or more before 1080P finds sufficient market penetration to make it worthwhile for manufacturers to start phasing 1.3 in in a major way.
I went last year and it was "limit one per item." I can't imagine it'd be any different this year. You'd have 4 or 5 people taking all the good deals...then a riot.
Then they let you use it without paying attention to it. Mine is pretty clear 10-10 to 10-12 and I'm not sure why they would send different ones. Anyone else have a coupon that gives a different date?
I'm really disappointed with the program now though. Since it started they've doubled the points needed so now it's $5 for every $250 spent. Nice to get SOMETHING back, but obviosly I liked it better before. :)