That hashtags-of-interests thing is a standardish Mastodon style. Used to be somewhat common on Twitter about a decade ago iirc. Mastodon’s original core user

That hashtags-of-interests thing is a standardish Mastodon style. Used to be somewhat common on Twitter about a decade ago iirc. Mastodon’s original core user base is largely people who left Twitter in 2016, so it preserves a few fossilised old-Twitter things.