These were the only moments (that I recall) where one could see empty seats:
Spoiler:
Shortly before it started
During the encore
It wasn't really noticeable during the show, except for that one moment. It was fine overall, I think it would have been a bit better with the lottery system but oh well, it's alright.
We've had such situations before:
It wouldn't surprise me if that second one had something to do with resellers and people not wanting to pay that much. Same goes for CDL19-20, I guess. There is demand but it's not big enough for some people to pay certain prices.
With the lottery they could always get good seats so I'd assume some 'casual fans' would go in that case (kind of like "why not"), but not when there is a ticket system like the one from Promised Land. But what do I know lol