For me,  there is no strategy in working in bounties or strategies to obtain a lot of profit from it because you can earn a lot when you are hardworking and focusing on your campaign, just stick with it and have a potential when giving all you've got in helping for the bounties that you've joined. In that way,  it is much profitable than cheating in campaigns like double accounts in joining of one campaign. If you just focus on only one account you can avoid banning in bounties because there are bounty campaign that were banning the double accounts. Atleast in one account, you can earn rewards than many accounts that joined but banned for cheating.