In one word, mission is share crypto knowledge each other and spread the word about crypto currency worldwide. Actually if there is no strong community, crypto have no value itself. So it's very important to build community like bitcointalk. Of course here is many opportunity to earn money. But did you think without proper knowledge can you earn ? I don't think, even if you want a job you should have proper knowledge about work process. So here isn't different, you should gain knowledge in order to earn.