agreed to know how to calculate reward based form the participants is definitely essential in following bounty campaigns.
it's in order to avoid some kind of bounty campaigns that will give low reward at the end of the bounties, there are some of them that gives low reward meanwhile have unlimited participants following their campaign which makes the reward reduced significantly lower in the long run.
Some bounties campaign limited with participants and easy to know how much allocated reward for all participants have joined, but not all reward based on our calculated exactly with bounty campaign still use altcoin as payment reward. Have been allocated and sent reward to escrowed wallet before coins listing yet and bounty campaign begin on first week, but few weeks later when altcoin project of bounty campaign have been listed on exchange market price drop and our calculated away from reward values. I think this big problem right now when joining with bounty campaign although have limited with bounty participants.