Federated private groups (Announce vs Add)

<p><a href="https://utsukta.org/channel/sk">@<bdi>sk@utsukta.org</bdi></a> mentioned <a href="https://utsukta.org/item/b3b12c30-f9fb-4cbf-9276-1cbf1d27f0de" rel="nofollow ugc">in another thread</a> that the way Hubzilla and threadiverse software handle group discussions is incompatible.</p> <p>It got me thinking about whether that is true. At its core both FEPs (171b and 1b12, respectively) rely on a central "distributor" node to send activities to recipients.</p> <p><a href="https://mitra.social/users/silverpill">@<bdi>silverpill@mitra.social</bdi></a> did further comparisons in thr text of 171b itself:</p> <blockquote> <p><code>Announce</code> activity is used instead of <code>Add</code>.</p></blockquote>