Can't wait for when OneDrive, Dropbox, Google Drive, ... are blocked.
Could also argue that the detection engine and definitions should be able to catch malware regardless of download point, soooooooo...
But there is a balance for blocking known malware domains and blocking general services that are being abused.
If the goal is to get CubeUpload to monitor for malware on its service, I suppose this is one way to push for it to happen.