明星正在卖课收割，这咋成新潮流了？

Core Insights - The course "向上闺蜜圈" by Xiang Tai Chen Lan has gained popularity, priced at 399 yuan, indicating a shift in the entertainment industry towards knowledge-based monetization [1] - As traditional revenue streams like acting and merchandise sales become less profitable, celebrities are transforming their fan base into paying students [1] Industry Trends - The rise of knowledge payment models reflects a broader trend in the entertainment sector, where stars are adapting to changing market conditions [1] - The shift suggests a collective transformation within the industry, as celebrities seek new avenues for income generation amidst increasing competition in content creation [1]