While I agree with your message (how could I not, considering how much I post/comment?), it's also possible that the example in the screenshot is a bot account.
I never took part in r/games, but in r/pcgaming, they even made a rule setting 24 hour post limits because it looked like most of the content was from 2-3 accounts that looked to be promotional in nature (almost no comments, just posts, generally covering more mainstream topics/news sources).
But yes, posting is good. :)
P.S. Even 10K extra WAUs across all gaming communities would make a massive difference! !games@lemmy.world has 4K WAUs, while Reddit has 1M+ WAU.