She had nothing to lose in the debate. Its' broadcasting was so limited, it's like it never happened.
The moderator rattled off a long list of stations or networks which were going to cover the debate (I don't think he included C-SPAN). I don't know what percentage of the voters were able to watch it but I would suspect most of them could.
Yes, but word will get out to a few people that she didn't do well. Knowledgeable people in both parties saw, or will hear, that she didn't do well. And that will encourage a few Republicans and disappoint a few Democrats. In politics, every little bit counts. You never know when such things will end up having an impact. Obviously the Shrew will win this year, and she'll win by a big margin. But a bad debate performance could, if nothing else, impact her presidential race later by impacting how some of the insiders see her.