Engineers are totally afraid of marketing. They think it's slimy and gross. But if you want people to use your product, you need to tell people about it.
All modern social networking and aggregator marketing that isn't ad-slot purchased, astroturfing, or some variation can be summed up as:
When your project is relevant to discussion, share it.
For example, I publish a niche product. The largest pure Lua game engine on the market. When people talk about game engines, usually 2D game engines, or multiplayer networking, I usually talk about Planimeter Game Engine 2D.[1]
Since ours is one of the few game engines (period) on the market that ships, out of the box, with full client-side prediction and reconciliation without a developer having to write their own networking code, and that's a pretty big deal for young or hobbyist developers, it's pretty easy to see why you might want to consider Planimeter's software instead.
Does Godot do that? No. Does Unity? No. Did you know that even Unreal Engine 5.1 has unreliable player movement out of the box? Yep. You're on your own with all three of the major game engines that are typically discussed. None of them do multiplayer client-side prediction for you, or in Unreal's case, they don't care if it's unreliable and your player jumps around everywhere--by design. Seriously.
None of those guys care at all about multiplayer. What they care about is marketing their photorealistic rendering pipelines. Except young hobbyist developers don't publish photorealistic games. They want to publish multiplayer games they can play with their friends.
And because there are so many pieces of game software out there, and there are larger competitors by two orders of magnitude above our offerings, I usually have to bring up our product more often to share alternatives with people.
The key is finding relevant times to share, versus spamming. Share when you release updates, share during discussions, go to places talking about the topic you're writing for.
See? Just like that. There was a topic at hand, marketing, I shared my experience with you, it was relevant, I didn't buy an ad slot, and hopefully you got something out of it.
[1]: https://github.com/topics/game-engine?l=lua