21 Jul 11 7:18 am
As Frank said, WF would be the best place to ask this. From what I know about Adsense though, Google has tightened up and I have a few mates who've had Google tell them to fill up their sites with more quality content for Adsense to be used.
Also, from what I've learnt from Matt Carter, you need to be testing heaps more with Adsense to see which niches have the best CPC (cost per click), and then just target those niches. It's not worth putting Adsense on a site and just getting 1 cent per click, when you can put it on another site in a different niche (get the same amount of traffic) and be earning 50-60 cents+ per click.
With Adsense it comes down a the classic formula (which you can see all over the Internet in different forms) of Traffic x Conversion rate x CPC = revenue. You need to increase one or all of them to see better results, obviously if you can opt for a niche which has a better CPC, then go for it. Then the conversion is dependent on your keywords, and finally traffic is all up to you.