I have tried reaching him by a direct email I had for him from a few years ago, but no answer. I would assume notifications of new postings on the thread go to that email. Also his original bitcointalk account got hacked so he had to change it, maybe he changed email also, and is not getting notifications. Maybe he is just been to busy with work and whatever. A lot of people have just lost interest over the crypto-winter. I can't really say what is up.  
I am going to post about the bounty on the forums elsewhere.
-M

Bounty post:

https://bitcointalk.org/index.php?topic=5115048.0
and
https://bitcointalk.org/index.php?topic=5115058.0