My university provides me with a Google Gsuite account with unlimited Google Drive space and a Microsoft Office 365 account with plenty of Onedrive space.
Is it possible to use one of these as storage location for my backups with deja-dup? After installing a few Python modules, I find Amazon S3, Google Cloud Storage (which apparently is not the same thing as Google Drive) and Rackspace as possible candidates, but not these ones.
Here is a way. Not necessarily a good way, but a way.
Set up (non-free) Google Drive client Insync. Run your backups into a folder that is synced to Google Drive through Insync.