Yesterday, Tumblr rolled out Tumblr Blaze to all users over 18 in the United States. The feature lets users promote their content in the same way you might boost a tweet or a Facebook post on those respective platforms — you pay a set fee between $10 and $150, and you’ll get an estimated 2,500 […]...
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Tumblr said 420 Blaze it (but literally)
techcrunch.com