2026 Grandma's Marathon already sold out?!

In previous years the full marathon has taken approximately a month to fill up. This year the full, half, 5k, full great grandma's challenge (full+half+5k) and half great grandma's challenge (full+half) have all sold out in less than 12 hours. Is this actually legit? I have never seen it sell out like this and definitely not at all distances + challenges.