I participated in a bounty sometime early last year and in that bounty, I joined the telegram group channels in other to participate in discussions and news concerning the projects. In August last year when the participants were not paid and many people were asking why bounty tokens were not distributed, I was disappointed by the reply of the developer when I said "we work for you and your refused to pay us after six months" he said " you did not work for us and bounty is not a job it is a free tokens"  since then I only participate in campaign that paid in Bitcoin or ethereum and the payments is made weekly.