Roughly 79 BTC, 49 of it targetted from one member. Btc began moving 2min after the post asking for btc at regular intervals and even after it was realised something was wrong, totalling around 200Btc. They were asking for 400btc. No one has claimed these transfers so are thought to be "trust paymets" from the scammer to make it look legitimate. These trust payments continued after it was pretty certain it was a scam and was being called out as one. The Nxt technology wasn't involved, nor did any NXT change hands. It was done through a forum post asking for BTC, the old fashioned way..
So 79 years then?