I am giving my opinion here and you can leave your opinion too.
There is no way to get rid of the Alt account, especially the cheating part in the Bounty campaign, I can say the purpose of the forum is not for that,
some Alt rules are allowed on the forum, the problem of cheating lies not in this forum, but in the rules of the Bounty campaign itself.
For example:
Nearly 99% of Bounty campaigns employ members of the following sections: Twitter, facebook, Telegram, youtube, instragram and so on, the main requirement is to meet the highest Followers rules, especially the T/F section, the campaign doesn't make rules, you have to be the highest ranking member, Well, that's where a bunch of Alt accounts will appear who want to generate some of the tokens offered by the Bounty company, There are no high shelf requirements, the important thing is that you have lots of followers.
Conclusion 1: if you want to get rid of or reduce the involvement of alt accounts in Bounty, campaigns must create additional rules for certain ranked accounts to complete the terms of the Bounty campaign, although some involve Alt accounts, but it will be limiting because you have to have a certain rank to be a participant, is such a method possible, the answer is of course no, reason: because the company's profit is not based on members, but based on tweets and Rets from Twitter accounts, facebook etc.
Another solution, every bounty is paid in Bitcoin and only advertises based on sig, not with social media, is such a method possible, Of course you can, but the company can't afford to pay the bounty participants, because nowadays there are many companies who cheat, for nothing.
Conclusion 2: I don't think the forum wants to get rid of the cheating Alt in the Bounty, because the cheaters, cheating and so on it's not moderated, the problem that the OP meant that could solve is the Bounty manager itself based on the rules, the others can't.