I just passed the $100 threshold and will be set to receive my first PIP next month. I put Adsense on my site Jan 28th, and its been a long road, but I finally hit that mark. This is where people jump in and say now its time to get $5 or $10 a day, then $100 a month, week, and then a day. I won't argue.
There's going to be another post in Google Search News that is a companion to this one, but for my Adsense experience, this is what is happening. I have about a site that pays anywhere from .02 to $1.50 a click, a good amount of the time its roughly .60 a click.
I don't think I have been "smart priced" I don't mind the "Ads by Goooogle". Any questions I've had that skated on the thin line of the TOS, I have asked Google directly.
For example, including the section targeting wrapped around my meta keywords, although it may have been a good idea on getting great ad targeting, they would much rather have the section targeting in the <body> instead of the <head> section.
Also, I checked with them about cutomizing the colors palatte. Since I'm using a different color then what is presented in the palatte, it was ok for me to customize the color.
I also checked about being able to open the click in a new browser window, this was not allowed as well.
On some pages I use colors that match the background, and others I have a color that is a nice contrast. On the forum, im using link units underneath my logo, along the navigation menu and it blends nicely. On the main site, Im using a 2 ad skyscraper on the left side under my navigation, and the right side under the google search otpion. One page particularly performs very well with the ad on the right hand side.
The targeting towards my site is terrific. I've allowed all the google bots access to the site, except the forum due to a phpbb hack that forced me to take down the old one, and now webmaster tools is returning a bunch of 404's.
My site does not employ any pop ups or pop unders, its nice and clean.
The content is all handwritten by me, except for 50 pages, that are from a friend.
I built the site to help people out, when I came up with the idea, I had no clue what Adsense was. There was the hope that maybe I would get revenue from advertising, but primarily the site is for helping out those in my niche, since its something that I have good knowledge about.
So if anyone has found the site useful, (I do have return visitors), then my task has been accomplished, and I made $100 on top of it. :)