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Ning is leading in Top 1M Sites and The Entire Web.
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Flattr Button is leading in Top 100K Sites.
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Ning has better usage coverage in more websites categories. Including Community & Society, Science & Education, Arts & Entertainment, News & Media and 19 other categories.
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Flattr Button is leading in Computers Electronics & Technology.
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Ning is leading in most countries, including United States, Spain, Brazil, India and 103 other countries.
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Flattr Button is leading in Germany, Austria, China, Switzerland and 14 other countries.