I've done alot of Fraud Control over the years for various programs and I can assure you that NOT having the referring URL's on an account that is doing 1:20 is a huge red flag.
The majority of people that I have shitcanned for fraud were trying to hide their URL's. I won't go into some of the sneaky methods that people have used to cheat, but some of them are pretty damn slick and on many accounts it took weeks to track down what they were doing to scam us out of $.
In the majority of cases when asked for referring URL's we would be given a bogus page that was just created that day or some lame excuse why we couldn't look at the URL. Most affiliate programs have wording in their TOS describing how traffic can or can't be sent. Hiding referring URL's is usually a big no-no.
Despite what some people in this thread think, exit consoles show up as a referring URL. You have to actively try to hide your referring URL's 99% of the time when they do not show up from a normal page.
This line from Scorescash TOS
http://www.scorescash.com/terms.jsp could be in effect in this case:
7. Scores Cash will pay you for unique visitors that enter our website(s) received from a banner(s)or text links served from your website. A valid click is registered as 1 unique visitor. Tampering will lead to termination, loss of all funds, and very possibly prosecution. Our log files will prevail in determining amount of clicks.
Hope both parties can sort the mess out. These things are almost always either a mistake or someone getting caught breaking rules and getting pissed about not getting paid.