His argument involving vending machines lacks basis seeing as they do not currently accept such denominations as pennies, 1 dollar coins, 50 cent coins, and two dollar bills (those being the most relevant, but they also rarely take 5's, 10's, etc). They do however often accept bills upside down and in orientations different to that pictured above the slot.
In addition, typical brail is less than 1/8th of an inch in height off of a page, placement on edges or corners would only have an effect on folding and compacting of bills. The paper bills are made of now could easily support a pressed mark in them decently.
It's a few bumps, not a new shape.