Ah Kevin, you beat me to it! Just to add a little more color to that — most of our customers focus less on how much time users spend on the community, and more on how much participation (posts, kudos, blog comments, etc.) and usage (logins, page views, message views, etc.) there is in general. There are exceptions — ad-supported sites might be one... - http://cothrel.tumblr.com/post...