As new media power takes on new dimension in the digital realm, some scholars begin to focus on defending the democratic potentialities of the Internet on the perspective of corporate impermeability. Today, corporate encroachment in cyberspace is changing the balance of power in the new media ecology, which "portends a new set of social relationships based on commercial exploitation". Many social network websites inject customized advertisements into the steady stream of personal communication. It is called commercial incursion which converts user-generated content into fodder for marketers and advertisers. So the control rests with the owners rather than the participants. It is necessary for online participants to be prepared to act consciously to resist the enclosure of digital commons.