Big bounty hunters are those who made a lot of accounts and do the bounty at the same time, well your friend might be greedy but for sure he has a goal to achieve and thats why he did that. You dont need to rely with your friend, bounties are just around in the forum, find it on your own.
Making a lot of accounts to do the bounty will certainly lead to be banned from the bounty without getting paid so I don't think that's th way Bounty Hunters make make right now.
His friend might just stepped upon a bounty of a project that delivered a shitty worthless product that tokens ended being dumped.
To all bounty hunters who are like my friend ,there is nothing wrong if you teach a man how to catch a fish instead of giving him a fish ,this is crypto space and its WIN WIN for everyone ,your rewards is yours and same to others too.
AFAIK,there is nothing to be taught.You have to find a bounty you judge promising and participate, that's it.If the project succeed you will get good moeny if not you will get almost nothing.End of story