Other than using hashtags, you can join an instance which specializes in the content you want to share. Other members will be able to see your posts on the instance’s feed.

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Nostr might be more private and autonomous, but it’s full of crypto shams.

Unfortunately some studios, companies, etc. use it as an official or semi-official forum. I still lurk on AMD’s subreddit, for example.

Eh. Was checking out Nostr a few days ago because it sounded interesting, but it’s just full of cryptobros.