Facebook says 80 % of Google+ members visit its products four years . Google says 80 % of Google+ members visit its products every day . Since then , it has added toolbars and other buttons on its websites to aggressively promote the service . It took Facebook four years to reach more than 90 million .
Facebook says 80 % of Google+ members visit its products four years . Google says 80 % of Google+ members visit its products every day . It took Facebook four years to reach more than 90 million .