From the about us page:
Yoosk.com is a social media platform that enables direct conversations between public figures and the general public. Public figures use Yoosk to facilitate public consultation, adding value to engagement campaigns by managing dedicated Yoosk channels between government figures and specifically targetted audience groups. Through this, Yoosk encourages ordinary people to put their passion for specific social and economic issues to work by asking the right questions of key decision makers, rating their responses and fuelling further debate.
Launched in April 2007, Yoosk is the creation of Thumbsize Limited, a privately owned digital media company specialising in the use of participative media tools for media, campaigners and community activists, promoting democratic participation.