J C Lawrence
Do you find the 'owned' or 'played' stats useful to monitor uptake at the user end of things, rather than the bulk purchase/sale information you likely already get? Do you monitor how the 'played' figure changes over time to get a feel of impact and longevity for a title?
No. I don't track or pay attention to any of that (including original sales). I design games that I find interesting. As such about the only thing I pay attention to regarding them is how (and if) they are prompting interesting conversations (interesting from a design and analysis perspective).