Because of current events, I'd like to ask a question (doesn't really matter whether on meta or on the main site) about how to find and support black game developers, or otherwise support the Black Lives Matter movement through buying games, playing games or other gaming related activities. Note that this isn't that question, this is just to gauge whether it would be on-topic for this site.
+1 for very important topic.
I think you (and everyone else) can do a lot of different things:
On the Main site ask good on-topic questions about games you want to promote. No need to mention how and by whom they were created, good questions will increase game popularity anyway. Extra points for making it into hot network questions. Same goes for answering, upvoting and bounty awarding.
This meta is open to all kind gaming related questions and activities. For example, you can promote your streams (like (Ended) Livestreaming question answering!) or you can run a bounty marathon (like OMG HOLIDAY BOUNTY GIVEAWAY 2012) or maybe invent some new type of community-event.
Create a community promotion ad: Community Promotion Ads — 2020 . If I understand conditions correctly, your ad will be shown on the main site if it gets at lest 6 upvotes in that question.