Actually all Linksave.in does is redirect to Rapidshare or any of the other file hosts, and the main reason the uploaders use it is they are banking on you looking for you content on Google searching for "your content" "rapidshare.com/files" and so forth for every file host.
Once you start the download of your content just copy the source url and there you have it. It might come out looking a little different, for instance for Rapidshare it might look like
http://rs342tg2.rapidshare.com/files/ followed by a number and the file name, but Rapidshare will accept that for the DMCA and remove the content. Does that make sense?