This is totally personal speculation based on how I would have behaved if I were in his position as a whistleblower that was a strong human rights privacy advocate. To me, his actions are incongruous with his statements. If he's not being manipulated by the Chinese, the other option is that he is just naive or careless and picked Hong Kong without considering what kind of political implications it would have, and was either unaware of its history in human rights and privacy, or chose to ignore it.
I'm fully willing to believe my opinion will change if more facts come in; just as it it stands now, I remain skeptical.
I personally don't think he has any PRC ties, however it does foster an interesting discussion, and isn't that what HN is all about?