Some folks work because they have to, some work because they love the job.
Often when I’m working late I have an occasion to send an email to Rich, Kathy, Dennis or Betty (often as late as 11:00 p.m.), expecting a reply the next day. It never ceases to surprise me when I get a response within minutes. Rich has not put together a staff, he has put together the S.W.A.T. Team.
And hey, what other publisher maintains a fairly active presence on four or five forums to answer questions from readers?