I just got an email from MakerBot because I entered in the Thingiverse contest (which wasn't a very smart idea—see this post):

As a small thank you, if you'd like to get a MakerBot Industries Cupcake CNC 3D Printer, you can use the code M4K3R to get 5% off until the end of the month.

This offer is valid on any item in the MakerBot store.