Really wonder how they plan to increase their revenue on the AI training data, especially now that a significant amount of their data is “poisoned” by the models they try to train

About time they rebrand as ClosedAI.

Might not tick all boxes, but etherpad may be a nice alternative for you. It’s more like a collaborative note taking thing, but gets the job done if you’re not too concerned about encryption and hide the server behind a simple HTTP authentication.

It’s a german company. Be glad you are offered e-mails at all. The official german communication medium to this day is FAX.