the answer to your question would probably be shown not given. if you go here. agilemethodology.net you will see i use that service instead of parking. It generates content for me and I still put up revenue generating ads. thx
In some cases parking actually pays better than developing, especially in the short run. Developing a domain means that the content is competing with the paid ads. Parked is working pretty well for me, with SedoPro also doing very well on some domains. TrafficZ has the best landing pages and easy-to-use stats if you can get them to accept you. Leonard Holmes ParkQuick.com
One can earn a lot by just Parking the domains.. .. Trust me.. I am doing so.. and i am pretty much satisfied wid the result