We find it immensely helpful to have event tracking in google analytics for video presentations that that we have in our blog pages - this allows us to determine what percentage of page viewers actually play the video, how many play for more than 25%, 50% etc and how many actually reach the end of the video. All these stats are useful for monitoring and improve page and video engagement. Using google spreadsheets it is possible to create quite complex sequences of google analytics queries that give all this information in one view.
It would seem that webrotate product images could also benefit from this type of event tracking - for example 1) to establish what percentage of customers spin the product image at all (if you don't autospin it may not be obvious) 2) do they spin it enough to see all the available hotspots 3) do they open any hotspots ... as a start.
If you are not in the position to incorporate such tracking yourselves is it possible for you to provide a mechanism via API callback so that we can fire off a google analytics event in the case of the types of behaviour described above. It would allow us to establish if our customers are actually utilising the product spin functionality we are going to so much trouble to create.