tl;dr: Tesla's recent earnings report used a JPG to hide information about their Bitcoin sale from text scrappers.
What's the point of it? I'm sure there are many "journalists" watching their fillings capable of forming articles with textual headlines and content.
EDIT: Sounds more like trolling and FT ate the bait.
That is so shady that is aught be to illegal. If they go these lengths what else are they doing that is actually not legal?
When I went to uni they told us of people trolling when asked for legal discovery (court ordered disclosure in law suits) using smelly paper and black paper with red ink to reply.
What's next, 2pt font white text on white background "Fuck the SEC" repeating in the footer?