IMO very unprofessional to shutdown the service on such a short notice. People who build apps on top of chain now need to spend their December porting their code to an alternative instead of spending time with their family or working on the other things that were actually on their roadmap.
I'm not effected, but at least now I know I wouldn't use any service of that company for the future.
I disagree. 1 month is plenty of time to do workarounds. There are plenty of alternatives around.
If you built an service that depends heavily on a propiertary "free" API, you are the idiot in the first place.