I hated the adds on my Kindle for books that weren't related to anything I was reading. I definitly didn't need the romance novel adds popping up on my kindle at work.
I wanted a case that covered the devise screen and stayed closed, but allowed for easy one handed reading.
The idea for the design was taken from the linked model, but it was basically built from the ground up in Tinkercad. This model prints with no supports.
I am using filament for the hinge rods. This allows for mixing of colors, and a simple bill or materials.
The author remixed this model.
Resized to fit 7th gen Kindle. Magnets moved to the bottom and hinges resized to fit new size.