I wouldn't go so far as "snake oil", just "pointless fun". As mentioned elsewhere in these comments, the idea behind this was "what if I could run an image file

I wouldn't go so far as "snake oil", just "pointless fun". As mentioned elsewhere in these comments, the idea behind this was "what if I could run an image file as a Brainfuck program?" It's not a rigorous academic study of the merits of Brainfuck as a steganographic technique.