As of the second quarter of 2011, LinkedIn's global memberships grew to 115.8 million, reflecting a 61% increase from 2010, with predictions estimating user numbers to reach 165 million by the end of the year. The platform has over 1.3 billion connections and significant member engagement, with 17.8 million users involved in groups. Additionally, LinkedIn's revenue surged by 120% to $121 million in the same quarter, indicating strong financial growth.