Amazon is always doing this, it seems like they never have the supply on demand for what they know people will truly want.
This is true with many things nowadays. It seems companies would rather have something limited vs making sales.
Like that new zelda book. Nintendo and darkhorse are both idiots. They could have made triple the amount of limited edition books they made and they would have all sold. Either Nintendo or darkhorse doesn't like making money.
They have millions of fans and they didn't think 4,000 copies would sell out.
Compared to years ago it actually makes sense nowadays to pre-order certain things as you won't get them later on at the same retail price.
Though instead we lose all the good pre-order bonus.