To be fair, a large fraction of Hetzner's costs will be RAM/SSD prices (since that is what they are selling), and they're in a competitive market, and known to have competitive pricing.

Bunny CDN of course runs on RAM/SSD but their costs are also developing and operating services on top. Their costs are comparatively less impacted by the RAM/SSD issue.

Hetzner might not have raised prices so suddenly if they had similar services.

Indeed, Hetzner DNS has been free for a long time.