I would like some clarity on general apparent self-promotion of open source projects as well. As in, points 1-4 don't apply and 5 depends on your definition of "advertisement".
I'm bringing this up because I (once) previously attempted to share a project^1^ I maintain on here. I did take some effort to include some context and discussion points for selfhosters in order to make it more tailored and stay safe on Rule 3. It was quickly removed by mod. I tried reaching out to one of the mods to try to understand what was wrong. They were friendly and said they weren't involved and would forward to the relevant people and since then I haven't heard back. It would be very helpful to be able to get some feedback on why submission was removed so we can learn how future submission attempt could be improved (or abandoned).
^1^: FLOSS, no commercial or otherwise proprietary parts or relations, no slop or clank in the process