Of course when you face such things while participating in some bounty campaign and understand that you have done some tasks and got nothing as a result of such situation like the project turned to be a scam - it is one situation. But when you invest somewhere and you understand that you lost, it is more sad. But as for me I make the analysis of the situation that has happenned and just move on, just keeping in mind such an experience in order not to repeat such mistakes.