Then what happens do we thing? The remaining number of those 18,000 extra tickets are offered to the next lot on the list? And so on until there are none left?
Think so. They will steadily go down the waiting list until all the available STs are sold. Or, depending on how many of the original 18.5k are left, they might do it the old way, ie, email people in order one at a time until all sold.