Objectives: This research, using the interview methods, attempts to identify a new type of network users which is called as “online parasites.” Since online parasites have a higher level of information retention and activity than ordinary passive users, companies that operate online communities should consider the needs and meaning of “online parasites” when activating inactive users. Methods: This study conducted preliminary interviews with seven participants to observe how they use the internet, why they join the online community, and how they obtain information from the online community, regardless of whether they have the experience in posting messages in the online community. Results: This study explores the relationship between the active user, inactive user, lurker, and online parasite according to users’ interaction behaviors and the perceived contributions to the community. In addition, online parasites are defined as users who access and use the online community and produce interactive behaviors (such as likes and favorites) with the content but have no substantial content creation and contribution. Conclusions: Compared to Lurker or passive receivers who read newspapers many years ago, most internet users now have a certain degree of enthusiasm like online parasites...