I have one quality site and 2 other sites that aren't really kept up all sharing the same adsense account. Should I have the quality site on it's own adsense account? Would this increase the CPC? Thanks
I don't see how it would effect your CPC. Anyways, as windtalker stated, it is against the adsense TOS to do so.
Another site will not affect another site. no need to own another accoint which is against adsense TOS