if "the other half" happens to include an optional hw kbd (battery?) or whatever, you'll get that against your voucher.
or you could use the voucher simply to pay for the device itself.
and you'll get a special feature (more likely thematic then functional) for your device.
like a back cover with a nice picture or something & a matching theme.

but yes, apologises, my post was unclear about that. thanks for the clarification