I almost didn't see their email because it's sent by "notification" (notification@hetzner.com, no name set). Title is "Update on our pricing".

Anyway my increase is: EX44 (HEL1) € 44.76 -> € 50.76

Not pleased especially as the reason for the increase for existing customers is a nebulous "The costs to operate our infrastructure has increased dramatically."

Why?

Maybe I have email notifications off.

I think it's RAM and server prices globally shooting up. Extreme RAM shortage and increasing hoarding of all types of hardware supplies.