Yeah, I have a suscription to PSM as well, and I recently got that issue as well.
I read it, and I've been anticipating MGS3:S for a few months now.. and when I heard it was for pre-order, I wasted no time to order it.
So I've been having this receipt since then, waiting until Tuesday to go to EB games and pay for it.
It's only $30 in total!