This is not evidence. This is random people speculating on Anthropic's margins without any real evidence.
Just because it is on some blog post, it does not make it true.
I wasted the time to read the first blog post. It considers 100% utilization over the course of years to calculate an estimation, and it did not consider depreciation for the model itself. That thing is extremely extensive to create, and after a relatively short amount of time is considered outdated.
All your argument hangs on this.
I see no evidence of this being true.