It's not a PACKED Wal-Mart, but I'd say it gets pretty bad. I might get my mom and brother on Amazon, too; at the same time. When the sale starts, we all hit buy. One of us is bound to get the game, right?
If we do get it, how will we know? Because say we all get a copy; we'll want to cancel so others get one.
it'll put it in your cart if you were successful. then whoever gets it can just make a call. you have 20 minutes to cancel it if you don't want it (in case your brother and mother both get the same game).