Q: Do the files/documents that are submitted need to be uploaded under a team account?

A: Yes, to conserve the anonymity of individual members. If you are able to "conceal" uploaders (not available for Google Drive or DropBox), you may do so.

Box: https://support.box.com/hc/en-us/articles/360044196273-Managing-Collaborators

**Folder MUST be made under Team Account's email, but non-owner names can be hidden.