One of my white hat blogs dropped from a PR2 -> PR0 after the last update. So i got to thinking why that would have happened and i have a theory. Because im also using one of the sub directories on this site as a landing page for Google Adwords. Has anyone tested this theory? Somebody stated it was because Google noticed my domain was spammy. The only explanation is that Google probably doesnt like it if you use one of the sub domains as a landing site. Im pushing at least 2k people to the site though adwords. But its certainly not though spam. I just have a feeling that i should probably have setup a separate domain all together just for PPC purposes. .. anyone?