But why are there sig campaigns here? Where else do they exist? Is it due to the financial nature of this forum, is that why it attracts people who want to advertise? And then people buying and selling accounts? I never even thought of such a thing until I saw it here and right after wondering how much btc I could get, decided the practice must be directed towards a more higher level of manipulation? I just don't know but the scenario of a money and finance info hub having a large amount of dummy accounts seems like it's leading somewhere dangerous.
They exist because bitcoin is still a niche, there aren't many advertising sites and to use a bitcoin service you first need to know what bitcoin is. That's why you can't go just anywhere and say you're accepting it, because your ad will target people with no knowledge about cryptocurrency, and almost certainly no coins.
Signature campaigns target specific people and allow them to test the services, for example you can use money from promoting a bitcoin casino to play there and test the site and have no regrets if you lose as it's free money.
Multiple acounts, selling and farming them can indeed hurt a business and it's being done as we speak. I've dealt with made up stories, posted from new accounts and I assure you, a simple ban doesn't cut it. I've recently reported a guy, who wrote over 100 spam posts in 3 days, got banned and in response made 3 new accounts.