This. We got hit by a sudden change in a popular SaaS' pricing, from $10 to $75/mo - a 650% increase. We don't have a big margin, if a different provider did this sort of thing overnight, we could be instantly out of business. It's already difficult to build a competitive business even WITH the ability to outsource a class of problems to a SaaS.
I've been a big fan of Hetzner for the last decade, and I understand and agree with their motivation for this change. However December 1st is effectively almost tomorrow, they could have easily given us a month's notice instead.