From the campaign:
Mr. Black here, dear backers, and I have a $50,000 surprise for you!
I'm super proud of everyone getting out there to vote on their favorite base design, and looking at the polls we have two clear leaders.
So I figured... This is the first New Design Stretch Goal... Let's give you something special. That being said...
We're going to go a head and unlock the GRAVEYARD BASES for you guys at $50K.
In addition we'll put up another poll as we reach this Stretch Goal to determine the next selection...