Exhibit A: Seinfeld reruns being on eight different channels.
Another program is on the rise in syndication. The show has finally given men a reason to watch Lifetime Channel (after they cancelled Supermarket Sweep, which I still mourn). In 2005 How I Met Your Mother premiered on CBS. While not an outright success like Two and a Half Men or Big Bang Theory, How I Met Your Mother built a devoted but semi-modest fanbase. I only knew a handful of people from my high school that actually watched it. This is all pre-syndication. Now, the majority of my friends have been obsessing over the show (mostly because of Neil Patrick Harris' Barney, who is an awesome character). A year ago my sister couldn't force my brother to watch the show. After recently watching it in reruns, he has since rapidly inhaled the six past seasons.
Because of reruns, Family Guy went from Fox's sacrificial lamb (Fox bumped it around the schedule in its early history against Who Wants To Be A Millionaire during the game show's heyday). As a more personal success story, consider this. My one friend never watched a single episode of Friends until our sophomore year of college. After watching a rerun, we devoted spring semester to watching all 10 seasons of the show. That's 236 episodes of Rachel, Monica, Phoebe, Joey, Chandler and Ross mainlined into our collective brains. And this was all because one of our friends caught a repeat.