What did you learn in altcoins, those projects didn't paid bounty hunters even after successful. We can gather information by all unpaid bounties and with reasons why didn't paid. For us this is very hard when our good research is successful but admin cheated to bounty hunters. List why didn't paid, your experience and history about unpaid projects
After long time some Coin I earned from Bcnex exchange. This rewards was paid by their exchange but admin locked the withdraw option. It's been two months they are saying that doing hard work to solve the matter. Some people start to believe that Bcnex is scam exchange.