Despite his past actions, isn't releasing this as an open source project ultimately a generous act? Many people have paid for this product in the past—ergo it has value—and now, it is free for use and modification.
He's not able to sell it now, so it is essentially worthless. He is now trying to salvage his brand/reputation by this "noble" act. I say we should have longer memory than goldfish when it comes to issues like these.
He also used GPLv3 which Apple hates. They even stick with a ridiculously old version of bash (3.2.57 from 2007!) since it had since began using GPLv3 in subsequent versions.
Yeah, I'm not suggesting he's a saint or deserves a parade, but I am happy to have another real-world, full-wrap iOS project to review (whether it's well written or not, I don't know) or repurpose.
Edit: My point is: you say that it's worthless, and perhaps it is now to him, but not necessarily to others.