It’s a shame this is being downvoted, because I think these are interesting topics to discuss. A while back I found this article which talks about similar ideas; it’s is from a few years ago but I think makes points that are still valid. It talks about how there is a lot of ambiguity in ActivityPub, and there aren’t really standardized ways for different implementations to interact - a lot of it is ad hoc, and as you pointed out, doesn’t always work well, or may work better in one direction than the other. Hopefully it will become more standardized in the future and remove some of the ambiguity.