Write down every topic that you are knowledgeable or passionate about. You'll have a much easier time making money from a blog you are interested in, rather than trying to write content you don't like because you think it will make money. Some examples are hobbies that you enjoy, your career, or some specific and miscellaneous knowledge that you have.
Anyhow, the good thing is I think we can very reasonably expect a warning before anything like that happens. Enid Hwang (one of Pinterest’s top honchos) recently spoke at the AdThrive Summit and shared that Pinterest does penalize/look down on/treat any differently an approved API partner (like Tailwind) than it would someone who is manually pinning — this has been known for some time, it was just nice to hear them reaffirm it (any conjecture beyond that is merely a rumor).