According to him, the exch still owes him 0.8 BTC for the work he did for them.
He is now confirmed cheater and a liar, so I have no reason to trust anything he previously said.
I remember his eXch bot was clearly stated as community project that have no connection with eXch.
And eXch always paid everything, and they donated to many other projects, not just to him.
Wow, so eXch owes money? What an allegation! Just like dkbit98 says, I recall that he had developed a bot just for fun and that eXch donated 0.3 to them, without any commitment on eXch's part. It was just a donation.
In general, eXch was always awarding (and paying) the amount the said they would.
@Trêvoid since you haven't received your money back, I will add a negative trust on bchannel's account.