I use Xenu link sleuth to check my site for broken links and am wondering if this goes against Adsense TOS. The adunits don't register clicks from xenu but am worried that for some reason or another, Google might think I'm trying to fake clicks. Any ideas?
If you're worried.. why won't you stop using it? How many pages do you have in your site? (They can't be checked manually?). Anyways, my only suggest is to contact google (adsense) and see what they think about it. It doesn't take long to send them a message and they reply fairly quickly.. better safe than sorry.
There are about 10 thousands links within my site and I usually run the program once a month to look for broken links. I sent an email to Google but haven't heard anything back yet. I'll hold off using it until I hear from them.
Why wont you use https://www.google.com/webmasters/tools/siteoverview?hl=en There are stats from google bot itself about broken links and much more.