Add a "profitability" column in the main window

When users mainly use a ratio-limited torrent website like T411.io or equivalent, it is good information to know the "profitability" of a torrent, which is the torrent ratio divised by the upload time.
This profitability varies depending of the mean upload speed, the content size etc...

Adding such a column (which, in my opinion, should be disabled by default) would add greatly to the user experience.