eta:... including a submission of a post by Elon Musk.
I think they're simply generally very low quality/low effort submissions that sink to the bottom of the "new" page fast.
2. Users seem to be flagging Twitter related posts (presumably because they're tired of hearing about it)
3. Flagged posts don't show up in Algolia search
If you click through the previous pages ("more" link at bottom of page) you'll still find plenty. Though I don't know why the search isn't returning those results.
Twitter shows me enough Elon Musk, despite my admiration of the man, and my repeated "Don't Care about this Account" attempts