Clinton has always had a very light campaign schedule, even in the primaries.
Hillary Clinton Gambles in Choosing Small Events Over Huge Rallies
Of course, no candidate choses small events over huge rallies. The simple fact is that Clinton struggles with getting more than 1,000 to show up for her anywhere. During the CA primary, while Trump was rallying tens of thousands, she was eating waffles with 70 people.
She has essentially run a non-campaign, depending almost exclusively on negatives ads, and having her media minions do the heavy lifting of actually campaigning for her. This frees her to do closed fundraising events, tiny rallies, even tinier “organizing events”, and the heavily scripted and controlled “town-halls” and carefully conducted “interviews” where she knows all the questions, and prepares scripted responses.
Unfortunately, there are way too many people out there who aren’t paying attention, and will march off to the polls and vote for her. Then there is the democrat fraud machine, which I’m sure has already banked millions of absentee and early votes.
Bernie had much bigger crowds than Hillary during the primary. Hillary still won the nomination.