killdebtdead.com is a website accessible in The Lost and Damned. As the name suggests, the website is for a debt management company, claiming to be offering debt consolidation loans, debt settlements, and debtor "elimination" services. It actually is just another scam website to trick people into life ruining debt.
An email linking to this website can be found in Johnny Klebitz's Eyefind mail inbox at the start of The Lost and Damned.