Instagram was the target of a storm of outrage on Twitter and other sites after the company announced a change in its user agreement that hinted that it might use shared photos in ads. Karly Domb Sadof/AP hide caption

itoggle caption Karly Domb Sadof/AP

A photo illustration shows the photo-sharing app Instagram's fan page on Facebook's website. Facebook is acquiring Instagram for some $1 billion. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images