There will be rogues and people who promote rogues in any industry, including this one. The free market generally takes care of it, and I’m not sure that there is a better solution.
I suppose someone could make a list of programs that it’s okay for me to promote, but I didn’t get into this particular business so that I could do what someone else tells me to do. I got into this business so that I could make my own decisions about what I should or shouldn’t do, and live with the consequences, good or bad, profitable or unprofitable.