Yeah I think I was mislead by the fact that only 10 signed posters were being given away in the Toranoana physical store.

I personally ordered from AmiAmi but if I knew otherwise about the posters I definitely would've gone to CDJapan or HMV. It really sucks because I've been itching to get a poster ever since it was announced. I guess I need to be on the ball next time.

Also thank you for the quick reply, I've been reading without an account for a long time. Perhaps I should start participating, maybe that will keep me better informed.