It’s sort of minimalistic / lightweight alternative for IntellJ. Red Hat is working on the extension(s) which have worked fine for me at least for the past few years and it gets updates regularly.
I use VSCode for C++, C#, Java, Python and for things like docker-files, html etc. IntelJ is fine but a bit bloated in comparison with its menus, sub-menus, sub-sub-menus and built in unnecessary extra features for those just looking for code editor.
VSCode workflow with Java is mainly using it to write code, run tests, configure maven/gradle/docker/etc rest is more or less using CLI and Command palette.
With hundreds of games, updates, dlc, mods, merchandice, videos and streams appearing each passing day gaming communities would get flooded by spam if no such rules would be in place. If you want to advertise on a commercial platform then you should do so through official channels.
Generally lemmy and reddit communities favor more organic content like for example solo game developer could ask for a feedback on piece of art of game mechanic they’ve implemented to their game in gamedev related communities. They could also participate to community events like screenshots saturday, share your progress friday or anything similar.
Now /r/gaming and /r/pcgaming are probably huge communities that are mostly about discussing gaming news, articles and just general topics around gaming. These communities are probably hard to moderate as is and allowing people to self promote there could lead to flood of indie or mobile game ads, streamers and youtubers trying to get more views for their vods or streams, etc which could really annoy the community.