Hashtags-as-a-service isnt new thinking, but tags.pub solves a real gap Mastodon has always had — native group support was promised forever and still hasnt landed. The problem is hashtags fragment across instances. Tags.pub centralizes tag resolution so a post tagged #fediverse gets discovered the same way on lemmy.world or a small microblog. Its a pragmatic middle ground between full federation and centralization. Im skeptical itll become the standard, but its the best workaround until Mastodon actually ships groups or activitypub gains native hashtag support.