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Flattr Button is leading in The Entire Web.
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OpinionLab is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
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Flattr Button has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Games, Reference Materials and 12 other categories.
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OpinionLab is leading in Finance, Travel & Tourism, Lifestyle, Food & Drink and 3 other categories.
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Flattr Button is leading in most countries, including Germany, France, United Kingdom, Austria and 71 other countries.
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OpinionLab is leading in United States, Canada, Ireland, Saudi Arabia and 5 other countries.