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. 2017 Dec 1;7:16743. doi: 10.1038/s41598-017-17135-1

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Time evolution of interest for social network sites in Hungary and the inactive users on iWiW. (a) Google trends of iWiW and Facebook for Hungary. (b) Number of users who became inactive in until a given month. The green line is a parabola fit in the form of 210 m ², where m is the number of months after July 2006. Before August 2010 this gives a perfect fit indicating a linearly increasing churning rate. After that time the rate grows super linearly.