Have a fight on April 8th from Newark to Fort Lauderdale. With the quarantine order for people going from NJ to FL and the general state of the world, we will not be taking this trip. I got bumped once from my original flight to another with an hour difference in time. This new flight was full at first but is slowly emptying out. If I understand the ever-changing state of refunds if I get moved 6 hours I can get a refund? This is the last EWR-FLL fight within 6 hours. Three questions

1)How close to flight time can I cancel online and get the ETC?
2)If they bump the time more then six hours and I want my refund I assume I cant do that online and they will make me call?
3)How close to flight time are they actually canceling these nearly empty flights? it seems they could be playing a game of chicken with a lot of us to see how cancels first

Thanks so much for all your help.