Instagram boasts 90 million active users

Instagram, the popular photo-sharing service that Facebook bought this year, is the target of a storm of outrage on Twitter and other sites after the company announced Monday a change in its user agreement that hinted that it might use shared photos in ads.(Photo: Karly Domb Sadof AP)

So much for scaring off users over its controversial terms of service.

For the first time, photo-sharing site Instagram shared statistics on its user base, boasting 90 million monthly active users who upload 40 million photos per day.

"Instagram continues to see very strong growth around the world," says co-founder Kevin Systrom in a statement. "With many of the product and internationalization improvements we've made, we've been excited to see these efforts resonate with users globally."

Among some of the other statistics revealed by Instagram: photos receive 8,500 likes and 1,000 comments per second.

The statistical breakdown follows speculation into whether the photo sharing service was losing users in the wake of concerns over its updated terms of service.

Last month, Instagram introduced new terms with language suggesting user photos could end up in ads on the site. "To help us deliver interesting paid or sponsored content or promotions, you agree that a business or other entity may pay us to display your username, likeness, photos (along with any associated metadata), and/or actions you take, in connection with paid or sponsored content or promotions, without any compensation to you," read the original update.

The company has since backtracked, sticking with terms the site has used since launching in October 2010. They take effect on January 19.