@elkaki @feditips @ernest My guess is that you can comment and upvote, because “favs” from Mastodon should translate to “upvotes” in kbin. But since there is no “dislike”-button in Mastodon there is nothing that would translate to “downvote” in kbin, therefore you cannot downvote a kbin post via Mastodon.
However, there are fediverse platforms that have a dislike button, like for example friendica (which I am using). Dislikes from here may be translate to downvotes on kbin, but I haven’t tested this.
To you other question: you can follow the magazine by copying and pasting it’s url into the search field of your mastodon app. This way you find the magazine in mastodon are able to follow it.
@elkaki @feditips Yes, you would follow them like you’d follow a user or rather a group. There is already a thing like groups in the fediverse, like Guppe or Forums in Friendica which you could already follow before from mastodon.
But if kbin magazines in Mastodon behave the same as already existing groups then your guess is right, they would definitely flood your timeline, because every single post made in them would be shown to you. 😬
Mastodon doesn’t handle group-like content well right know, but they are working on improving this as far as I know.