Re:Facebook disqualifies leaders of Deepfake Detection Chall...
by amitport on Monday June 15, 2020 @10:19AM
(#23527594)
They're explicit that this data should be shared. Obviously aiming for it to not be a part of unique contribution of the contender. They may not provide a tight enough statement about that, but it is fairly clear.
Competitions that allow external data are at least partially explicitly about that. If they weren't they wouldn't allow external data (which is not exactly uncommon on kaggle).