I know nothing I'm afraid, but this morning was what I expected to happen: some tickets re-listed at a random day/time and with no announcement. The lucky few in the right time/right place (and those who read NSC) get to grab them.
I wasn't on the ticketing site with any knowledge - I was...
They'll be snapped up in seconds.
I'd suggest keep refreshing the page as the odd one or two may come back if people have them sitting in a basket and don't complete the purchase.