I remember doing 2 to 3 rounds of bcnex exchange bounty campaigns when they were raising funds and after the campaigns and launch of their exchange they just started complex rules to pay bounty tokens at first and then they stopped withdrawals calling for maintenance but even now when maintenance period is over for good 6 to 8 weeks now withdrawals are not paid they either remain pending or are rejected without any reason. So this was definitely one scam project with scam bounty campaigns and there were so many similar campaigns in last 2 years or so, i wish there was some police or authority who would trial and jail such fraudsters.