It seems that services of this kind, meaning question / answer services, are still relevant. Yes, some of them are closed, but in general such services are quite in demand. An example of this is the purchase of a Fluther startup by Twitter. This startup just allows you to get the answer to the right question. So, Twitter bought Fluther not only and not so much in order to create its own such service, as to improve the search tools for users' records.
So far, despite all the efforts of the developers, the built-in search engine of the microblogging service is rather inconvenient, as many users say. In order to make the life of the microblogging more convenient, the service management decided to buy Fluther. The fact is that the project includes an interesting search mechanism that shows the user exactly the information that is relevant to his interests. ')
Of course, telepathy here does not smell, it is a complex algorithm that allows analyzing users' messages, the subject of his discussions with other users. It is worth noting that the need to improve the built-in search engine on Twitter entries is becoming more urgent - in fact, according to some data, about 71% of the records posted by users remain unanswered. Yes, perhaps this is due to the fact that some users publish something that does not interest anyone except themselves, but the figure of 71% is still impressive. Below is a video that serves as a graphic illustration of what has been said.
In addition, Twitter is going to extract and practical benefits (read - commercial) through the introduction of new search technology. The fact is that the service applies the original monetization system when a company or an individual pays a recommendation by the service of its message, site or discussion.
In principle, it is possible that Twitter will eventually create a question and answer service after the introduction of the Fluther search technology. However, this will not happen as quickly as many would like. Well, we are waiting.