I was quickly scrolling thru the playlist comparing the general shape of low-to-high skewed song ratings.  While most show strong 6-7 ratings, it's easy to spot the exceptions.  RP obviously stores the data of these ratings.  I expect William and company deeply analyze this data to see trends in artists and styles and perhaps correlate them to day of week, time of day, current events, etc.  Seems to me those are fascinating data with a ton of information to be gleaned.

@William - have you guys published or considered publishing trend information derived from the playlist times and ratings?  There are so many ways it could be viewed and so many observations that could be made.  If not publishing trends, would you ever consider making an anonymized version of your raw playlist times and ratings data available?  In the hands of a responsible analyst, the data could have a life of their own. 

Couldn't a person just harvest the data—anonymously or not—without even being logged in?