Didn't Hetzner prices increase 30-40% recently? See https://news.ycombinator.com/item?id=47120145

As such, I doubt the noted price reduction is reproducible. Combine this with Hetzner's sudden deletions of user accounts and services without warning, and it's a bad proposition. Search r/hetzner and r/vps for hetzner for these words: banned, deleted, terminated; there are many reports. What should stun you even more about it is that Hetzner could ostensibly be closely spying on user data and workloads, even offline workloads, without which they won't even know who to ban.

The only thing that Hetzner might potentially be good for is to add to an expendable distributed compute pool, one that you can afford to lose, but then you might as well also use other bottom-of-the-barrel untrustworthy providers for it too, e.g. OVH.