Why influencers in China are always associated with incubators?

Unlike US influencers who are usually able to draw remuneration from ads revenue via social media and video streaming platforms, Chinese KOLs (key opinion leaders) mostly monetize through their self-managed e-commerce businesses, which fact explains how influencer incubators have thrived. They perform management tasks and generally assist the influencers of each platform and make their profits by taking a commission from the platform income, some of the leading incubators also account for their business development through building connections with other affiliate or e-commerce partners.