I'm sorry but this says nothing about how they lied about the training cost - nor does their citation. Their argument boils down to "that number doesn't include R&D and capital expenditures" but why would that need to be included - the $6m figure was based on the hourly rental costs of the hardware, not the cost to build a data center from scratch with the intention of burning it to the ground when you were done training.
It's like telling someone they didn't actually make $200 driving Uber on the side on a Friday night because they spent $20,000 on their car, but ignoring the fact that they had to buy the car either way to get to their 6 figure day job