【正文】
0 users had asked questions on Weibo over a 100day ,a celebrity with plenty of online followers,raised the price for his answers from 5,000 yuan to 10,000 yuan each. Yang Lu,the cofounder of Fenda,said the price was dependent on supply and demand(需求 ).Online celebrities received so many questions that they couldn’t answer them one by one,so the price increased. Some users also said they could get answers for health problems from professionals online,and that the expense was worth it. ( ) many kinds of Payforknowledge platforms and apps are mention