Jan 28
Google is seeing an increase in CTR over the past five months after they made moves to eliminate sites designed solely to host ads, among other things. OptimizeAndProphesize blogger Jonathan Mendez, one of the sharpest SEO pundits out there, offers this take on landing page quality which should raise eyebrows if you are dependent on parked pages for your business model.

January 28th, 2008 at 10:46 am
The landing page quality refers to advertising parked pages on Google, not merely having a parked page. So I think your last line should read:
“which should raise eyebrows if you are dependent on parked pages [arbitrage] for your business model”