As BIRBZ are one-off collectibles, it would be a total buzzkill if someone bought all the cards at once, taking the opportunity away from others. The one-per-order limit discourages such a purchase.

You’re still more than welcome to own multiple BIRBZ, of course! Just note that each one will be a separate transaction.

And of course, if you’re just wanting to put your dollars toward a good cause (as all BIRBZ purchases do), you can always donate to any of the recipient causes directly.