According to a study by US-based Barracuda Networks, only about 1/5^th of Twitter users or 21% to be precise are actually regular users of Twitter. Barracuda Networks defined regular Twitter users as those users who have at least 10 followers, follow at least 10 people, and have tweeted at least 10 times on Twitter.com. The study also revealed that 49% of Twitter users and 48 of the top 100 most followed Twitter users, have joined Twitter.com only between November 2008 and April 2009. Most of these newly joined twitter users include renowned celebrities such as actors, athletes, musicians and politicians who started their Twitter accounts to make their followers aware of their activities in real time. This has led to Twitter.com being promoted as a daily service.

Also according to study, only 26% or just over 1/4^th of Twitter users had 10 followers or more as of December 2009, while only 40% per cent were simultaneously following 10 or more Twitter users. Barracuda Networks revealed that more than half of Twitter users or 51% to be precise, were following less than 5 people. In terms of tweets, the study revealed that just over 1/3^rd or A034% of Twitter users were not even tweeting once, while a whopping 73% or close 3/4^thA0 Twitter92s users tweeted for less than 10 times. That means that most of the tweets on the social network website were being generated by just 1/4^th of the users. According to Barracuda Networks, the survey was carried out on more than 19 million Twitter accounts, both legitimate and malicious, for assessing not just frequency and content of tweets, but also user-to-user interactions, and each Twitter account92s overall activity level.