Google Translation:

A thank you...

Although it is not mandatory, it would be very nice for the uploader to get a written thank you note with a torrent.
It is very disappointing for the uploader if a nice upload is downloaded
but that downloader does not then take the trouble to thank the uploader via a comment.

So take the trouble and write something nice as a thank you.
Because without uploaders the downloaders have nothing and this site has no right to exist.