No matter how many users provide answers to a question, as long as they don't go copying and pasting the replies of others, it's impossible for them to use exactly the same words.

As long as its not the same generic topics or threads, for example "How to earn bitcoin".As long as the thread presents a new idea, maybe not totally different from an earlier one, but it's a little bit novel, then it's no problem at all.
A thousand people can ask a question or make a topic on a general subject, but each of them can actually be requesting to know on a particular area or segment of that subject or making their own contributions(through topics)on it.