Discovered this morning that Maven https://heymaven.com (a social media startup who's CEO is ex OpenAI "Ken Stanley: leading the Open-Endedness Team at OpenAI") is mass importing public posts from the #fediverse with no links back to the original and no way to delete them. It seems there is no Opt-out or Opt-in mechanism at all. It also has posts from #Bluesky pulled in via @bsky.brid.gy@bsky.brid.gy that are also not linked back to the original.
UI differences are a big factor in the success/failure of decentralised federation of diverse platforms and content
And this seems a good example: bridged #mastodon posts onto #BlueSky which has a lower character limit than Mastodon.
So, just like #lemmy posts on mastodon, you don't get the full content of the post (which ends with an abrupt ellipsis here) and have to take a link to the original platform.
However powerful the underlying protocols, this isn't far from screenshots.
IMO bridging or translation isn't federation per se. Also it seems unlikely that protocols would converge to that extent. In fact AP implementations are already different enough that even within the same protocol it's hard to represent all the different activities instances can present.
Definitely, AP is not magic. But if even within one protocol round-tripping and full-fidelity is impossible or very difficult, that makes it only harder and less likely through a bridge.
@halm Diaspora only federates with Friendica (because the latter has diaspora protocol support). Friendica doesn't have its "own protocol", it uses ActivityPub with its own proprietary extensions IIRC.