Yes, they do, but you really cant tell which is paying more or less. (Dont go and look for high paying keywords list)
There is a way, but it is not an exact science and involves close monitoring of a couple of stat sources. If you aggresively implement channels a lot of the time you have one click and can see how much it was for, you then look at your stat system which should be able to tell you about an adsense exit and which advertiser it was. I think I have seen scripts that can give you a break down of all this stuff, but not sure it is worth it. Concentrate on giving your users what they want and you will succeed. And don't let people fool you that quality is the key. Lots of people have become very rich by peddling trash. All you have to do is give people what they want, it's not complicated.
build a website with a Word of mouth marketing. Have your own niche (if you can). This will bring you up......
Adsense is the hardest way to earn actually . Porn is good money I hear , but never tried . Clickbank 300-700$ a day isn't hard , and plenty of other affiliate-income schemes give good money .
You said a day? I was thinking in signing up with them. Are you making that money with them? Any tips for the poor?
You will not get really good helpful clickbank tips from anyone due to the fact that unlike adsense , clickbank "users" are usually in direct competition with one another. You can get general tips, and encouragement , but nobody really wants another player in his niche .
I think reading every single post in this thread is the secret. Really though, its been said at least 100 times in this thread alone... traffic and quality content will produce results.