Pangu did showcase an iOS 10.3.1 jailbreak last month on a previously unjailbroken device, namely the iPhone 7. However, the team did not commit to releasing it to the public. An anonymous user on Weibo stated that Pangu would release an utility. Based on this user, the assumption that Pangu would release the jailbreak was created.
Now, Pangu has become a corporate entity with their own security lab called Pangu Lab. It has been said that several big-name clients are lining up to hire them. Apple is possibly one of these clients and may have paid Pangu a large sum not to release the jailbreak (possibly 1.25 million).
While it is unlikely that Apple did pay that much for an exploit, they may have a long-term contract with Pangu to uncover iOS vulnerabilities. Another possibility is that Pangu is waiting for Apple to release iOS 10.3.3, which will likely be the final iteration of iOS 10 before iOS 11 is showcased at WWDC.
As you can see, jailbreaking has become harder and harder. Apple is slowing choking off jailbreaking and removing the hope for another jailbreak utility. We encourage the people and teams that are working on a jailbreak to not give and to keep fighting. We still have hope as long as someone is trying.
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