"quicky discover I couldn't post on the timeline of the music or videogames one"
That's technically true, but who cares? The instance timeline isn't a "community", it's just a particular filter applied to the global timeline. The communities of videogame and music enthusiasts are larger than any one instance, and can follow one another across instances, and see each others' tagged posts in searches across instances.
That's technically true, but who cares? The instance timeline isn't a "community", it's just a particular filter applied to the global timeline. The communities of videogame and music enthusiasts are larger than any one instance, and can follow one another across instances, and see each others' tagged posts in searches across instances.