Why did you post this question? It will certainly have a short lifetime. If a person knew their comment would definitely never be seen, it's probable most peop

Why did you post this question? It will certainly have a short lifetime. If a person knew their comment would definitely never be seen, it's probable most people wouldn't write them. But on most sites, people are notified about new comments, and even here, it's possible to look at your own comment history and see replies long after the fact. People post comments because they have questions and hope for answers--as you did with this post--or because they have comments and hope someone reads them and finds value in them. Same as any other form of communication.