Idk exactly. I got it from Twitter.
But those 40k sales were achieved after a month of PO. Right now, we hardly have a week so I don't think we are gonna get anywhere near to 40k.
Nonetheless, I believe all of us can wait until Oct 8th.
No preorder was longer on Twiceshop I got mine on Sep 4th before finding out they wont count since Im not US lol.