I think technology paid Q & An is a blue sea. At present, there are traditional education and training institutions, books, consultants (mainly legal, business, and technical consultancy services), as well as popular broadcasting (such as Himalayas) and paid Q & A community (Zhihu). However, paid technical Q & A service is currently only a section of SF, so why not step up promotion?

functionally, since the respondent is a commodity, there should be some reference information for others to place an order, such as how much does the respondent earn in the near future (how much has been sold? ), what is the customer evaluation? There are also private Q & A content (which may involve company secrets) should be hidden, can be made public as a way of secondary sales for others to buy? (second-hand knowledge market), once established, it is believed that there will be more professional technical consultants to join (knowledge Tmall store? )