I think she will show up at the debates. Her thinking is clear— she just has no energy. By that I mean that she finishes her sentences and includes big words and parenthetical clauses without getting mixed up. She was able to do that on the plane, a couple days ago. Trump can win the debate, of course, but never count on a lucky break like Hillary fainting or something. Especially since the press will spin everything against Trump.
Good luck with it.
Given Hillary is not the kinda girl to turn down big bucks.