The 30 day clause they are invoking can explicitly only be triggered by a copyright holder as I understand the license. So either they are one, are representing

The 30 day clause they are invoking can explicitly only be triggered by a copyright holder as I understand the license. So either they are one, are representing one, or (very unlikely) are somehow flat out wrong despite being lawyers. Assuming it's not the last case, they would also be aware of any commercial licenses.