I gave it a try and while they definitely have a ways to go to get it right, it's got a good idea. does the %PREVIOUSLINK% function work though? All I got is an anchor text with just a blue line under and no linking to anything.
The big issue seems to be that if it reads something like an incorrect password, it just skips to the next site without letting you have a chance to enter in the right captcha or anything. I've been a huge fan of Brute Force and will definitely keep using it until they get this product in better working order, especially when it literally shot out all my links at PING.FM in a mad rush making it look like spam.
Hopefully they'll take note of these pretty big issues and continue working on it.