I've often wondered whether services like WhyPark helped. Rick Schwartz has published his opinion on it - he thinks it's a total waste. According to him, his earnings dropped significantly (and it seems he never got paid either).
The Rick Schwartz Domain and Traffic Blog RicksBlog.com...Home of the "Domain King": My Response to Someone who deserves no ResponseAs for WhyPark....I talk with experience. I used that service. My income was cut by 66% and I have NEVER gotten paid for that traffic. So THERE you go! Not ignorance, experience.