This is going into the suggested guideline, but not rule category. There's no specific instance this is referring to, and there's no anger at specific people, but it's something that comes out of lots of occurrences over time. This also, even if it's good, isn't a rule, because obviously some circumstances are different than others.
You get Directed Promotion to push your own stuff. When it comes to mentioning your own games outside of that, be wary? sheepish? about it. Often, if a game you've written fits a discussion, it's probably a good thing to just be like: "Here is me making an interesting post about the issue in general. Oh, and I guess I made a game that deals with it, end of post."
If people want to know more, they can ask questions! If other people know about your game, they can bring up your game for you!
Part of roleplaying games being flexible enough to handle lots of different situations is that they could with some plausibility, be brought up in lots of different circumstances in relevant. Let's try and not use that for dubious ends and keep the self-promotion isolated.
If people disagree with this, feel free to disagree with me here! Let's talk it over.