How much web sites do you have ? On how much sites do you use adsense ? Now I have 2 sites with adsense, but I am going to build 2 new sites.
I have roughly 20 or some that all have adsense on them. Then I also offer 15 new ones each and every month to my members, which also are inbedded with adsense.
Sites, subdomains and pages hummm lost count. I would say percentage wise about 50%. Just depends on what converts best on the page/site dollar for dollar the affiliate links or the ads...
I consider a site to be a single domain, sub domains do not count. If we count sub domains i've got adsense on a couple hundred thousand "sites".
Until two months ago, I had two sites. One was a restaurants guide with about 80 uniques per day and both Adsense and Tradedoubler annoying animated banners (never again ). The other site was my corporate site and hadn't any advertising. Both sites dissapeared (some day I will tell the complete story, I promiss ) Now I only own a blog (the one that is in my signature) but I'm preparing two new sites (coming soon). The work of webmaster is a very funny hobby. I'm not currently using Adsense because I have very few visits. I only have one Amazon book refferal. But when I'll reach a non shame number (let's say a minimum of 50 uniques per day), I'll use it again, and also in the new two sites.
I have 16 sites of my own, with more in development. I also develop excellent adsense ready niche sites which I sell to other people to earn off So yes, Im pretty busy with site building!