I guess I'm not the only one that happens to this, I follow communities with the same theme in different instances, it's not unusual then to see the same link sent by the same person in both, not a crosspost, the same link sent separately. ¿Is there any, let's say, correct protocol on how to interact with this? You know, do I vote for both? One positive and the other I ignore? What if I want to comment? Do I make the same comment on both?
I don't think there are officiall guidelines. It's different comminities so if it is relevant and good content, I upvote both in these situations. Usually not posting the same comment, but depends.
Yes, well, I understand that there is nothing "official", I was asking more about the uses and customs accepted by the community in general.
I didn't mean it in a bad way. I doubt there is consensus. Gave my perspective, but I think ultimately just go with what feels right.