This is all real revenue, real spend, real usage.
Hetzner just aren't at this scale. Not even close. If they wanted to get into this business - first, they're late. Second, it's at a scale of ~10x of their total lifetime datacenter buildout. Third, they'd need to change their business to being one that is debt fronted.
xAI have proven out that being able to deploy compute is a very viable business (and difficult to pull off)
At some point AI cynicism clashes with reality, it must be exhausting maintaining it.
[0] https://www.wsj.com/tech/ai/mind-blowing-growth-is-about-to-...
[1] https://www.wired.com/story/spacex-ipo-anthropic-compute-fin...