This is a warning to any advertisers using Google’s click to call service – an advertiser of Google AdWords recently claimed that his click to call campaign is receiving invalid or fraudulent calls.

Hitwise has compiled the latest data about Facebook usage and market share in the United States. These latest numbers prove that Facebook is still the most popular site in the United States and has 96% loyal visitors who return to the site regularly. Here are the latest 10 Facebook Facts and statistics: