I think you got it right on the nose! Especially with & ships appearing in the background more commonly. Which is probably a combination of cannon friendships and common fanon friendships meaning that writing it in/tagging for it seems more natural compared to a background romantic ship that isn't the main focus.

It slipped my mind that for a while there was a problem with all MCYT fics being sorted into the Minecraft fandom... it totally makes sense for that sort of tagging etiquette to arise from that chaos!