Is it stupid to have channels active when their CTR is 0%? Does this lower your overall CTR and ecpm? I keep hearing this, is it true, if so does it affect revenue at all -- or does it just screw up stats?
I believe it just gives you an overall better comfort in managing your sites. I run three sites and I never bother messing up with the channels. Maybe once I get more, I will setup one on each site.