How does "add source" function of filetram.com work?

Now that is the question.

Honestly it's probably no more dangerous than listing your Web Site with any Search provider but depending on the company and their business model things could change and could introduce some issues down the track

There is also the matter of getting more Hits on your Site which can result in more attacks so the Is it Safe relates to a lot more than just the Search Service that you prefer. ;)

Col

I think you don't risk in any case...for instance, if i would be able i can parse all your site without your consent. So i think it is a good way to promote your site if it has lower PR than filetram.com's. For more information you can visit their blog.
Source: http://blog.filetram.com