Your intention is noble, but this is still based on network effects and a positive feedback loop. I doubt you can beat the social medias in their own game.
To make it worthwhile for the users before the project reaches that point, I am trying to make LinkLonk a better tool that helps you keep track of the content you liked (kind of a bookmarking service) and helps you follow RSS feeds in (kind of a feed reader).
If you have other ideas of how to make it more useful before we have enough users - let me know.
I have an idea; maybe you can enable people to publish a list of links that are curated by themselves, in the form of a RSS feed. This way your user can have a sense of ownership.
What you are suggesting is similar to another idea I had (https://linklonk.com/item/9146000221282140160): "An option to generate a publicly visible url for any of your collections. This could help you share your collection of liked items with other people. And it could help LinkLonk get new users."
Adding an RSS feed for these publicly accessible collections would be a natural extension.
RSS would be the next step.