If WTL worked they would have unblinded at the home run interim for PFS because well, wtl would have work. Instead they kept releasing sketchy PRs waiting on "events" which included OS since they realized the goal posts they originally decided to aim at were removed from the field.
Just think if NWBO was like a legitimate company and followed a protocol it designed, reported on the IAs it designed, listened the the DSMB of it's own trial, and took their advice after the IAs that were performed.
Again, this trial is long since over based on primary AND secondary endpoints so the company can feel free to unblind.