Our study relies on data from Foursquare containing the check-in history of 11; 326 users collected from January 2011 to December 2011. This data set was collected and used by the authors of [5] and is publicly available under request at [4]. The SecondLife data4 was collected from October 2014 to November 2014 containing the check-in history of 34; 277 users5. Figure 1 depicts the distribution of check-ins per venue in Foursquare (a) and SecondLife (b) in log-log scale. Please note that they are very similar to each other, i.e., some venues are very popular and receive most of the checkins, whereas the rest lies in the long tail of the distribution. The distributions of check-ins per user in both worlds follow a similar pattern, which we omitted due to space constraints.