The usual acquirers buy whole companies, including the programmers (which are actually the main thing they want). They don't buy just software in asset sales. So the fact that Justin and Emmett didn't want to keep working on the calendar meant that a normal acquisition was out of the question.

There's a difference between adding value and doing things for you.

Believe it or not, once you get into YC you still have to put your own work into your start up and not expect YC to magically work everything out for you...