If your company or cause is looking for a way to amplify your social message, Thunderclap might be a solution for you. As Facebook Hong Kong told me themselves, Facebook page posts reach only about 16% of a page’s fans, so finding a way to increase reach is critical for marketers.
Thunderclap launched in May 2013 as the first-ever crowdspeaking platform that helps people be heard by saying something together. It allows a single message to be mass-shared, flash mob-style. You create a page at Thunderclap and set goals for # of supporters or reach you want to obtain (e.g. 1000 supports by dd/mm/yy) and if the goal is reached the message will be sent out simultaneously on your selection of Facebook, Twitter and Tumblr. Check out their guide to creating and marketing your message.
There is no charge to create or support a basic Thunderclap. Get details on the premium Thunderclap Pro option. USD$500 gets you additional features such as: embed button in web page; supporter list download; full campaign statistics; and a branded campaign page.

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Mashable > ‘Crowdspeaking’ Platform Thunderclap Pushes Your Tweets to the Masses
The Guardian > Labour’s Thunderclap heard by 4.5 million Twitter users
Huffington Post > White House Uses Social Media Tool Thunderclap To Spread Message About Gun Violence Prevention