Core Viewpoint - The article highlights the questionable practices within the private domain marketing industry, particularly focusing on the role of "network video producers" who create misleading health-related content to sell overpriced pharmaceuticals and health products [1][3]. Group 1: Industry Practices - "Network video producers" are identified as a key component in the private domain marketing sector, purchasing products at low costs from pharmaceutical and health companies to create promotional videos [1]. - These producers exaggerate or misrepresent the efficacy of the products, selling them at prices nearly five times the market rate [3]. - The industry operates in a "gray area," with participants expressing concerns about potential exposure during the 315 Consumer Rights Day, indicating a fear of regulatory scrutiny [4]. Group 2: Expert Involvement - The credibility of the videos is often bolstered by the presence of so-called "medical experts," whose qualifications can be easily purchased, raising questions about the authenticity of their endorsements [4]. - Individuals posing as experts are cautious and reluctant to engage with media representatives, indicating a level of awareness about the potential repercussions of their involvement [5].