WeTransfer just changed their ToS to allow them to train AI on any files you transfer through them.
Don't use there service, especially for work that you don't have the right to relicense to them (e.g., commercial work that's exactly the most likely to create the huge files WeTransfer specializes in).
(ETA: this is already going boom so I'm muting it.)
@mwl
If you are a researcher* in the Netherlands and want to send large files, you can use SURFfilesender instead of #wetransfer.
Up to 2GB file size (and up to 1TB with HTML5 browsers) - for free!
Don't let your #researchdata end up as unauthorized AI training data, use #OpenSource based solutions instead.
*or anyone else with SURF access
Very good point. I've also updated my post.
Michael Lucas 
Nils A.
Ruud Steltenpool