DVR numbers are nice, but don't be fooled into thinking that Live numbers aren't important. For the most part, the biggest benefits in DVR gainers are the biggest rated shows to begin with. It's extremely rare to see a show that doesn't rate very well in Live ratings add more than other shows in DVR. Your Big Bang Theory's and Walking Deads are always going to be the biggest DVR gainers, as they are the biggest shows. Generally, the rich get richer and the poor get slightly less poor.
And I know I'll get countered with "percentage increase" arguments, but those are pointless. Would a network rather have a show add 75% of a 0.8 Live rating and get to a 1.4 after 7 days, or add 20% of a 1.5 Live rating and get to a 1.8?
If you want to help the show, stream it on CBS's website (I know it used to free, I'm not sure if it's locked behind All Access now). Only Nielsen homes get counted in Live or DVR ratings, but CBS gets to see exactly how many people stream on their sites. Also, throw out some #AmazingRace tweets during an episode, as social engagement is measured now as well, and it's only a matter of time before that factors into advertising as well (if it doesn't already).