About.com and Google

So, About.com announced this am that they would start serving Google AdSense on their pages.
In many ways, About.com is amazingly similar to Blogger– from a user-generated content, it provides a platform for personalize advertising (remember Kaltix) results–that creates pages for Google text ads.
Does this similarity mean Google will also acquire About.com?
Or that they could have acquired About.com and passed on it?
Or that Google’s AdSense will provide a margin of revenue against operating costs that makes it profitable for Primedia to continue to own this About.com?
Look for About.com to need to find some new ways to reinvent itself–perhaps as a premium service as some sort–to remain a vital piece of a very bottom-line oriented magazine company.