The power a media company has is derived from its market share, which starts with zero for a startup, and grows with the successful performance of the company.
Similarly, the effect a company has by withdrawing access to its services is proportional to the power it has earned through its performance over time.
Thus, the power and influence a media company has is not arbitrary. it is a function of its social relations i.e. the percentage of society it has converted into customers, patrons, and followers.
To directly address your example - it already exists. One example: Fox News is selective with its choice of guests. Some types of guests get more access than others. The way the system deals with this is to allow other vendors besides Fox to operate competing networks.
Similarly, the effect a company has by withdrawing access to its services is proportional to the power it has earned through its performance over time.
Thus, the power and influence a media company has is not arbitrary. it is a function of its social relations i.e. the percentage of society it has converted into customers, patrons, and followers.
To directly address your example - it already exists. One example: Fox News is selective with its choice of guests. Some types of guests get more access than others. The way the system deals with this is to allow other vendors besides Fox to operate competing networks.