One point that is not captured in the analysis is immediate voting on your own posts. There is a curation element to this upvote like any other. However all the rewards from such an upvote (both the author and curation parts) flow into author rewards (as the curator split is zero at t=0).

If you author a lot of posts and upvote them (say 5 posts out of your 10 daily upvotes) your curation rewards will be cut in half compared to if you author no posts. However you are receiving all the rewards from this self-curation, just in with the author rewards. So people who post a lot may be lower down the ranking (but actually may be better curators in terms of value gained).