This was brought to my attention today while looking for a fix to the problem of the Instant Adsense plugin only displaying text adverts.
Instant Adsense is a handy plugin which automatically inserts Ads into your posts and pages randomly but it hides a secret bit of code.
The author has inserted a section of code which replaces your Adsense ID with their own 10% of the time. It’s been reported to WordPress but I wonder how much money they’re making with this sneaky trick?
Beware! I certainly won’t be recommending it to anyone, but I just edited out the code on my site 🙂