Hetzner also offers a VPS with superior specs to their old DO server for €374.99/month, or €0.6009/hour. They could just switch to a VPS temporarily while waiting for the hardware fix.

Although since they were running a LEMP server stack manually and did their migration by copying all files in /var/www/html via rsync and ad-hoc python scripts, even a DO droplet doesn't have the best guarantee. Their lowest-hanging fruit is probably switching to infrastructure as code, and dividing their stack across multiple cheaper servers instead of having a central point of failure for 34 applications.