you can subscribe to the RPG channel in Mastodon, then you get all the new posts in your feed and now you can interact with it from there. comments show up in both (most of them anyway) and I think boosts upvote.
It should also work with friendica where likes/dislikes are turned into up/downvotes.
I think you are misconstruing what I wrote there quite creatively so you can do a little one-upmanship, hmm?