Here are the things that I have seen with AdSence. Minimal sites, personal blogs, small forums or group sites, sub-domain or free host sites, all get little to no AdSence Income. Here's why;
- Google take 2+months to pay on any AdSence moneys made, and even then, only a few pennies isn't enough to get over their minimum payment requirement.
- Google can, at their sole discretion, discount your traffic volume. They can make up your numbers and pay you only on what they say you performed, WITHOUT PROOF.
- Google can, at their sole discretion, decide that you have used BLACK HAT marketing such as spam, click multipliers, auto surfers, or other forms of less than reputable advertising, and withhold payment for fraud, WITHOUT PROOF.
- Google gets such a high percentage of Click Frauds, Spammers, Nigerian 419ers, etc. that they DON'T catch or cancel, that they absolutely refuse to discuss any account accused of using black hat techniques.
- Google can cancel your account without warning if you simply have any non-google ads or paid links on your site. Even if it's from spam in your visitors comments areas.
There are other money making sites out there with much better reputations such as AdBright and others. These advertisers may not have the number of advertisers as Google, but they service all of their accounts better. Unfortunately they almost all use the same CPC model as Google and suffer from the same click-fraud and black hat problems.
Two companies have started recently with a different model. CPT or Cost Per Time. This is a very simple setup, the advertiser pays for the amount of time that their ad is displayed on your site. That's it, clicks don't count, page views don't count. Sure, clicks and page views of your site are displayed to the advertiser, but this is simply to allow the advertiser to decide the value of their time with your site.
ProjectWonderful.com and BuySellAds.com both use this model. Check them out.