Neither users nor bounty managers are owners of the forum. Bounty threads are managed by bounty managers on behalf of the respective coin/token owners. The bounty campaign rules are put forth by the respective coin/token owners or the campaign manager approved by the respective coin/token owners and has nothing to do with the Bitcointalk forum, the rules of the forum or the owner of the forum. Since an user participating in a bounty campaign is paid for his/her participation, it is only ethical if the user follows all the rules of the campaign. Just because an user is allowed to create multiple accounts does not mean he/she can use this liberty to cheat (SCAM) bounty campaigns. Why is there a need to enter a bounty campaign with multiple accounts when you can post the same thing with 1 account? Isn't that FRAUD against the campaign owners. If an user purposely joins a bounty campaign with multiple accounts he/she definitely deserves a negative trust for scamming or trying to scam the campaign owners. Why should it be considered ethical when you are trying to scam a bounty campaign? Sure, the purpose of advertising is to show more people and you can do that with a single account. If you are going to get paid for doing something, do what the person who pays tells you to do. Its their money, their rules. Either follow it or don't join the campaign. You are not doing a favor to the campaign owners by posting with multiple accounts in the same campaign. If you are confusing this with certain programs paying a handful of people posing as hundreds of people promoting the same program in multiple places, you are wrong. That is unethical as well.