1. They may play a full schedule, but it's interesting for them to throw out there the possibility of game cancellations if the plan is to not cancel any.
2. No way will there be full stadiums of fans in 2020... so maybe they do some sort of lottery or revolving seat deal where a handful of fans get to go to certain games (and this would tie in to the cancellation statement, where if you didnt get selected for the lottery for a certain game, then you would get a refund for that game?).
Regardless, it's a bummer for everyone.