Microsoft discontinues "unlimited" OneDrive cloud storage for Office 365 subscribers quoting unfair use by some users:
Since we started to roll out unlimited cloud storage to Office 365 consumer subscribers, a small number of users backed up numerous PCs and stored entire movie collections and DVR recordings. In some instances, this exceeded 75 TB per user or 14,000 times the average.
Would be interesting to know why they did not enforce fair usage on a user-by-user basis, if this is indeed a reason for the change.