Lemmy definitely sends Announce/Create/Note to all followers (but not Announce/Note). Maybe Mastodon made a change recently to ignore those, because people used to complain a lot about their timeline being full of comments after following a Lemmy community.
this post was submitted on 13 Feb 2025
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ActivityPub
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Focused discussion related to ActivityPub integration in NodeBB
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Guppe Announces the original post, and the replies to it, but doesn't Announce anything else. For the replies, it also does what PeerTube does and sends out them unsigned, for instances to verify using the LD signature in the activity, or to fetch from the source. If you want to meaningfully vote on something that came from a.gup.pe, you have to send it to the original author, not to a.gup.pe like you would if you were voting from something from Lemmy, because a.gup.pe will just silently drop it.
Lemmy's communities Announce everything, but Mastodon only comprehends Announce as a Boost, so it just rejects the Announce of anything that's not a Page or a Note. There are other platforms though (e.g. Friendica) who will see the Announce of a Like, and go fetch it from it's source (most non-Lemmy platforms don't trust Lemmy-style Announces, because whilst it's against the spec for Announce contents not to be an exact copy of the original activity, there's nothing stopping a rogue community from misrepresenting users or undoing their intentions).
@julian FEP-1b12 only works with activities,
but Lemmy also announces Page objects for (micro)blogs.
https://socialhub.activitypub.rocks/ap/object/443fb143373ebc5a4df190cddcd2da1f
@[email protected] ah yes, thanks for reminding me of this.
When I refactored my 1b12 implementation, I actually removed the second Announce(Object), but I think I will add it back.
I have been following a Lemmy community from Firefish and I only get original posts, you can see this behaviour here: https://electricrequiem.com/[@[email protected]](https://community.nodebb.org/user/comradeship%40lemmygrad.ml) However Firefish has had problems with following Lemmy communities so this may not be the default behaviour from Mastodon.
Still, I do think that boosting all replies is not ideal, especially for busy forums. If a topic gets say 50 replies, it can really flood your timeline. Also personally I have set up my Firefish account to only show me original posts (and boosts), to have a cleaner and more compact timeline. With a forum account that boosts everything, you can't filter replies, they all end up in your timeline.
So my suggestion was to perhaps create two accounts for following a forum, one than boosts everything and one that boosts only original posts. This way users would get a choice, and if they find that following everything makes their timeline too busy, they can choose to get only original posts, instead of unfollowing the forum completely.