Sorry for necroing this thread, but the shop is just curious enough to talk about. It's not an obvious fake, but it ain't easy on the eyes, everything about it just screams "overlay!1!"
The first impression is wtf? The miners are ideally laid out for shopping: ~parallel to each other, so no fancy shading would be needed if shadows were cast, which they're not. Shot from nearly perfect 12 o'clock -- no worries about 3D stuff like perspective & parallax.
Shit cellphone cam (duh), though the EXIF data's stripped.
Why the the note? The paper is ~flat, so any handwriting can be overlaid without worrying about shading & distortion introduced by "crumples." The miners don't overlap the paper, so it may as well be posted in a separate shot
The thumb drive seems to cast a shadow toward 10 o'clock, but could be anything -- motion blur, lens distortion, phone cam software trying to compensate -- but if it's a shadow, why none from the miners?
@route: What looks like USB plug size discrepancy could be simply perspective -- if the lens is ~above the thumb drive & ~4 feet up, the scaling would make sense.
There's another detail -- in the bottom row of miners, the miner in the right-hand corner (the one with one of the screw holes barely visible) seems to be identical to the second miner from the left, same row. The shading/reflection on the the USB plugs is close enough to say "same." I made a 2-frame overlay gif (cropped from your pic -- aligned on the usb connector).
So, not 100%, not proof, but sure backs up my first impression.
