freemium
/ˈfriːmɪəm/noun
usu. as modifier
- a business model, especially on the Internet, whereby basic services are provided free of charge while more advanced features must be paid for免费增值商业模式（尤指因特网上的一种商业模式, 即基本服务免费提供而较具特色的项目必须付费）。
词源
early 21st cent.: blend of FREE and PREMIUM.