After lots of experimentation, the ideal number of LinkedIn posts is 2 per day.
Why do I say this? LinkedIn’s current algorithm will share a post for two hours if your test network reads it. When you publish more frequently than this, then it doesn’t go into wider sharing and gets fewer views.
Didn’t I share that I had published 8 posts a day? Didn’t those get more views total? Yes, but it was a decreasing number of views and less than the two posts a day total would continue to get the next day and sometimes following days. There was a lingering effect from only publishing two posts since it didn’t overwhelm your network.
Now if you have lots of things to say you can write as much as you want. Just realizing that there is a decreasing effect. It is more useful to think carefully about what you want to share, and then to make your two posts link to other articles if you want to share more deeply about the topic you are focusing on.
Is there a downside to only publishing two posts a day? Not really. I would argue that it focuses you to think about what you want to say more and you might have a higher quality of writing. Volume doesn’t make up for quality.