The bots are made to make money . Ask whatever bot owner lol. As for advertising, there is the Promoted tab on the steemit page itself (right next to: Trending, New, Hot, --> PROMOTED ) . So, you want to use the intended promotion tool, then there is one to use .

If people would understand how to use the tools they have available on steemit (whether bidbots or the Promoted tab) there would be a much better mass adoption and it would be way more popular . But bcs of people like you, and others, and for other reasons, it is not happening .

ROI will always be negative if there are people with money and no mind -deeming them ingnorant, careless and wasteful - and deeming the platform to become a pitty .

You want to have people on the platform ( so that they can read your advertised posts) ? Then you have to start act like a team player and be fairer in your actions .