Stupid shit like this is the reason I moved everything to my own Nextcloud instance. It's completely free, open source and surprisingly have a BETTER user interface than Dropbox. Rclone can sync to the WebDav interface.
By the way, for those who don't want to use one of the existing providers [1] and don't want to operate their own server either: Hetzner started their Nextcloud as a service recently:
Interesting. Makes sense at the low end I guess. The more expensive ones are quite similar to their dedicated servers, which gets you compute as well. So you'd be better off rolling it yourself.
https://nextcloud.org/
https://rclone.org/webdav/#nextcloud