Those with significant control of a large media-based forum may also be called a business magnate.
In the 20th century, proprietorship expanded to include ownership of radio and television networks, as well as film studios, publishing houses, online platforms, and other forms of multimedia companies.
Reflecting this, the term "press baron" was replaced by "media baron" and the term "media mogul" (or "Hollywood mogul" when applied to people specifically working in the American film industry) was popularized in colloquial English.
Media proprietors are likely to claim that their publications are editorially independent and unbiased, but this is often questioned.
[1] Social networking services such as Facebook are sometimes considered media companies due to their widespread influence.