If I have say 6 mini websites, and each has it's own content, and say one site is about credit cards and earns on average $2.00 a click, but the other sites earn 4 cents per click average, using channels can I make it so all of the sites get the same adsense ads as the credit card site does, even though these other sites have nothing to do with credit cards ? Or does it all depend upon each sites content, meta tags and keywords for the adsense ads that appear on them?
Channels are for tracking purposes and have no bearing on the ads being displayed on your sites. If you want to have control over the ads displayed on your site, try using Revenue Pilot or one of the other ad networks that gives you some type of control over the type of ads shown on your site regardless of the content of the site.