The real scam here is these sites not caring about truth, not even asking for any evidence or identification which allows unscrupulous types the opportunity to disgrace and discredit their competition. The real scammers are the ones making these posts about Bettortrader. See these sites for more info -

http://bettortrader.wordpress.com/2008/10/13/bettortrader-scam-reports/

http://www.bettortrader.com/why-bettortrader-is-not-a-scam.html