Also, correct me if I'm wrong but don't you have to be a Junior member and above to join a bounty campaign?
Unlike signature campaigns, anyone can join social media campaigns, even newbies. Their task is to promote the project off forum. Hence, their ranks here doesn't matter. They get paid based on how many followers they have.
I believe good campaign managers only accept junior members and above. I mean what is the point of keeping that one account per person rule when they can literally create 100's of social media accounts to participate in the bounties? It's really bad for the forum that a person with 100 social media accounts has to create 100 bitcointalk accounts as well to use them. This needs to stop and the most effective way is, restrict the campaigns to people who have earned a merit or two at least.
There is a general consensus among bounty managers that you can't enroll with more than one account but since there is no rule regarding this in this bounty campaign, am not sure if what they/he did can be considered as cheating (they/he didn't break anu rule)
It's also a general consensus that if you participate in any campaigns or bounties two more than one bitcointalk account, you're a cheater.