I am agree with you that bounty campaign is tiring because most bounties not paying on time or even not paying a single penny and converts in scam. But this does not mean all bounties are scam and we have to quit the bounty hunting wok but for avoiding this we have to be selective to choose bounty for work, we have to check its site as we are investing in ICO because we are investing our precious time for that project to marketing that coin to collect its much needed fund. And you can also check the bounty manager's trust level before joining any bounty.And for merit it is very hard to go up rank with merit.