Well, to me it looks like a way of scamming fans out of money. I saw it on his twitter feed when i was looking to see if he said anything about leaving out side of the image posted and thought it was a joke until I saw fans messaging him saying they bought it.
I kind of reacted like that too when I saw it. Especially when I first watched the youtube video explaining it and thought it was a joke. I then was like well maybe he's starting a clothing line? No? Just charging large amounts for cheap merch?