Basic man,
I felt like writing one. I use thunder-ball myself but just for trade finding so I never really tested out their link-checker. The reason I created it is that I enjoy challenges and this one was. The other part of it is the challenge of features that people request to be included. So basically it might start off as serving one purpose, but can serve many purposes later as more features are added that might not be directly related to monitoring links. I wrote the software, spent 10 minutes on the site design (as it shows I'm sure), and just put it out there for feedback and to see if people appreciated it.
--EDIT--
This is not a link trade system. It's just a monitoring service. I just re-read your post and it seems you're under the impression this is a link trading system.
