[czep]

Think of the people you've helped get their jobs done over the years. That's worth more than author credit in the colophon of a man page.

[naniwaduni]

The man page has ... probably helped plenty of people get their jobs done over the years!

edit: or the program the man page is documenting!

[laumars]

Your first point is fair too. Commands are useless if nobody documents their usage.