Several, like https://www.expertengine.com/ https://www.expertengine.com/ Apparently a $1B business https://www.bloomberg.com/news/articles/2018-02-28/investor

Several, like https://www.expertengine.com/ https://www.expertengine.com/ Apparently a $1B business https://www.bloomberg.com/news/articles/2018-02-28/investors-are-paying-1-300-per-hour-for-expert-chats https://www.bloomberg.com/news/articles/2018-02-28/investors...