yeah they don't delete it because some people would see their post count seriously decrease (as reported by some of those who posted there )
So what and who care about their post count seriously been decrease if they get rid of the off-topic forum area because it been dead closed for 5 years, and beside I don't think Avast will ever reopen it for a second chance when I joined back in January 2004 and I've used the off-topic for at least 6 months than they slam the door since their was a civil war going when I remembered in past and than they closed it.
So what and who care about their post count seriously been decrease if they get rid of the off-topic forum area whoopee doo daa