We all know a couple weeks ago Yahoo decided to make a show for their advertisers and shut a lot of networks down as far as Arb goes. I know for a fact that Marchex, TrafficZ and a few other parking services that have large in house domain portfolio's are still allowed to do arbitrage themselves. Some companies are also allowing arbitrage with bigger clients but on an "at your own risk" basis. Being pretty new to WF I was just wondering if anyone on this forum still does any PPC Arbitrage to parked sites?