I can't recall the last time I saw an ad on reddit, but it's quite possible I blocked them myself at some point. I would be genuinely surprised if most technically-savvy people didn't do the same.
I've been developing for several years, and I usually visually tune them out.
I only adblock the companies that do pop-ups/pop-unders, or verbal ads. Flashblock tends to take care of the worse offenders anyway. If the ads are supporting a community then, I figure they deserve the change to appear, even if I'm probably not going to do anything with them.
Same thing with the PVR ... if it's an interesting looking commercial, I'll occasionally go back to watch it the first time I see it.
