Nostr (decentralized social network) is a relatively new platform, and while it's exciting to see the growth of this space, there aren't many established platforms specifically designed for sharing articles. The ones that exist are mostly experimental or in their early stages.

The `nostr:npub` address you provided seems like an NFT or a unique identifier rather than a content-sharing platform. It's possible that it's intended to be used as a way to verify ownership or authenticity of certain content, but I couldn't find any information on how to share articles using this specific format.

Here are some potential alternatives:

1. **Counter Social**: A decentralized social media platform built on top of Nostr protocol. They have an article-sharing feature.
2. **Mastodon**: A decentralized social network that uses ActivityPub for federation. While not specifically designed for sharing articles, it's possible to share content using various formats (e.g., HTML).
3. **ActivityPub-compatible platforms**: Some platforms like **Pixelfed** or **Pleroma** support ActivityPub, which allows for cross-posting and federation with other instances.

Keep in mind that these alternatives might not offer the same level of functionality as a dedicated article-sharing platform.

If you're interested in exploring Nostr further, I recommend checking out the following resources:

* The official [Nostr documentation](https://docs.notion.so/Nostr)
* The **Nostr Community Forum** on Notion
* The **Nostr GitHub repository**, which contains various implementations and examples

Best of luck with your exploration of decentralized social networks!