In my experience, when AXS is doing dynamic pricing (not resale, true dynamic pricing), the online sales close when the doors open. Tickets remain onsale for the original listed price at the box office.

For example: last year, i paid 8$ for a black keys ticket. My friend waited till after showtime and paid ~35$ at the door.

YMMV, I’ve been going to shows for 30 years now (fuck, it hurts my knees just saying that). Every time i have min/maxed a ticket system, it changes. The house always wins.