Following publication of the original article [1], we have been notified that one more affiliation of the corresponding author is missing.

Currently Balasz Vedres affiliation is:

  1. 1

    Oxford Internet Institute, University of Oxford, Oxford, United Kingdom

It should be:

  1. 1

    Oxford Internet Institute, University of Oxford, Oxford, United Kingdom;

  2. 2

    Department of Network and Data Science, Central European University, Budapest, Hungary.