I'm sure they did post closing notices before their closing dates... even if it was early in the run. The producers would close the show that early because it's terrible and not making money. They don't want to lose even more money by keeping it open.
"The stage is where I live and come alive and act out all the things that go on in my life. It's not just what I do for a living, it's my shrink and my love affair. No one in my life has ever or ever will kiss me on the mouth like this lover called my relationship with my performance."