Wait, were the token also stolen by dev? I thought the main issue with then was they cheated hunter by paying 95% less and later on got a taste how hunters retaliate by ruining their reputation (everything goes spiralling down after that).
The bounty issue was just the tip of the iceberg, after you follow the whole development of this "project" you can clearly see that it was a scam since the beginning, they never had any real intention to keep going, they just wanted to get the money and then slowly disappear from Telegram, social media, etc. Same goes with Idex exchange, it was just to gain some time and give the people an exchange, but there was no volume, so once again it was a fake move.