doublingstocks.com is a "pump and dump" scam that gets newsletter subscribers to invest in a penny stock tip they send out via e-mail artificially inflating the stock...the doublingstock people buy the stock before they send out the tip and sell when it is high making a bunch of money for themselves...they also get paid for promoting the stock...recently, according to the disclaimer at the bottom thier web sit, doublingstock received $125,000 from an unknown source (obviously someone making big bucks on the rise and fall of the stock)...they do not answer e-mails and their supposed USA address does not exist...