Well this could be a quite upsetting movement for the Web giants like Google, Facebook, yahoo etc because the new ad platform getting heavier and covering the ads on other networks Google and Facebook.
The software seems to be biased. When users download this tool for their social networking computer users open up a door to ads it gives the open opportunity to the tool developer to place their ads at the place of ads displayed on Google, Facebook yahoo & others and this causes giants a lot.
The WSJ said they are "inserting a layer of ads on websites or covering up other paying ads."
Lets have a look on this video regarding this bug:
This is undoubtedly very pity for the Adsense publishers because they are paying a CPM basis and instead getting nothing as third parties ads are enclosing their ads.
Forum discussion at WebmasterWorld.