I saw a Reddit post the other day of a guy from Wilkes-Barrie who had been begging and begging for AEW to have a show there so when he was watching and saw that it was broadcasting there, he was pissed that he didn't know and missed it.
Sure, he in particular could've paid a little more attention, but I think that sums up the marketing or lack thereof. I'm sure they'll work on it as time goes on. The fans still bring life to the shows, but a 70-75% full arena would add even more energy week-to-week.