It is clear that r/gunners is much more up to date than lemmy.world/gunners. Once Reddit API's come into effect, r/gunners will only be available on the official reddit app. Will anyone be willing to make the sacrifice, browse r/gunners, and then post all the same links/images on lemmy.world/gunners? I will for sure do my part. There is no need to drive traffic to Reddit more than necessary.
That's not a bad thing IMO. I like the idea of this community being just a few hundreds of thousands of people. Yeah, we won't get as many posts. But hopefully we can avoid some of the toxicity of the other place, and focus on quality over quantity.
And if even just a handful of us can pop a couple of good quality links a couple of times a day on this community, it will be enough. And like you say, that will encourage others to join in too.