What gives the tokens value? They're worthless until there are enough users to answer questions on most subjects. However, it's very difficult to create networ

What gives the tokens value? They're worthless until there are enough users to answer questions on most subjects. However, it's very difficult to create networks that rely on users to gain users. As others have mentioned, convincing users to use your service over stackoverflow/quora will be very difficult at first. You'll need to get a critical mass of guaranteed users before the site goes live in order to succeed.