For anyone curious, there are likely going to be no/few bleachers. This seems to be mostly a standing event.

So this won’t lead to “empty seats” in the sense that there are a bunch of actually reserved spots that nobody shows up to, but rather that they’ll probably just over-count the number of expected guests, and maybe leave a bit more of a gap behind the barriers than they otherwise would have, which could just make the crowd look sparser compared to their predictions.