In re.: cross posting. There is something to be said for cross posting to smaller social networks. While Twitter has become huge, anonymous and jadded, people on smaller networks (diaspora, mastodon, friendica, etc) are paying closer attention and are also looking for thoughtful interaction.
For now, the only way we can replace Twitter and FB is by at least supplying good content and helping those small networks grow. Those small networks may not be perfectly Indieweb compliant but I can see value there. People are trying to escape the corporate silos and we should encourage that.
I use this to crosspost to Mastodon. crossposter.masto.donte.com.br