IMHo the main use case is keeping up with a crazy world in data not words written by other people. I have trust issues with the media and with social "new media" and just crave data so I can form my own views as best I can and decide what to research into deeper. It's extremely chaotic and I expect it to get even more chaotic. I can see other uses, such as in prediction markets, investing, journalism as well. But mine is more of the pure play "monitor the situation" type.