They might have had delivery contracts from before the prices increased, so they didn't have to pass them to customers. Maybe the last servers from those contracts got delivered already and any new orders need to be bought at much higher prices.

Another possibility: They were growing too fast and need to slow down. At some point additional growth might become too risky, or even exponentially more expensive. It might require fundamental organizational changes.

> Have no clue what's going on in the back

Hetzner and OVH and other bare metal but low cost providers use commodity hardware. When that commodity hardware increases there is simply no other option. The secret to the success of these providers is using common off-the-shelf hardware instead of specialized server hardware, which is now being cannibalized.

The AI bubble has increased the prices of nand and ram by a factor of 4, so a 3x increase seems reasonable. Companies that are not big enough to have long term contracts with ram/nand vendors have been hit really, really hard by this.