Thanks for the advice Zikibru, that was a good read! @djromanof I'll look into something like that in the future if this doesn't work out at all.. Thanks for the advice..
obviously you only have 1 adsense box. no wonder. add more adsense ads to your site. there are lots of free space there.
quality traffic comes will come in time. He wanted to say that digg traffic is not quality. This not means that those people are stupid, they are smart too, but they see few hundreds of websites each day from digg, and they have high bounce rate ( they enter, read few lines and go away ), they visit dozens of blogs each day so the change that they will subscribe is low. They have low CTR on adsense ads. They have knowledge, they won't buy anything cause they know free ways to get what you are selling. They have knowledge, they won't click on ads. They are not interested in what your website is about, they thought that the story was featured, is worth few seconds to read first words. "If the story was dugg, it might be good, don't matter that i'm not interested in it" . You will benefit from digg traffic too, they have blogs and want to check cool stuff, maybe you will get backlinks, and then traffic and search engine positions. For adsense, quality traffic is the traffic that comes from search engines, because they searched for something, and then they came to a page where they read something, and then they want to read more on that subject, or do more, so they will click on ads. SE traffic will come in time and after you do some basic seo stuff. Traffic that comes from other blogs is good too, but not as good as SE traffic is.
Thanks for that heavy paragraph "thedark". It makes a lot of sense. I guess it's all about quality traffic.