First of all, I cannot see anybody, day after day, making 10 posts a day

For these numbers, they don't need to post at all.

Anybody does that kind of self-voting is going to make a lot of socialist vigilantes happy, as they will have some serious flagging to do

Again, this on curation only, zero self voting.

If you are self-votting, did you calculate the curation deducted correctly...since you will also earn as a curator of your posts?

I only calculated the curation.

curation.

1 voter only will split the vote 50/50 curation/post.

5 minute window.

vote at:
0 min- lose 100% of curation
1 min- lose 80%
2 min- lose 60%
3 min- lose 40%
4 min- lose 20%
5+ lose 0.

However, there is a convergent curve that applies additional weighting once a post gets above (I think) around 10 Steem on it.

Vote after 5 and lose no curation, but those that vote earlier will benefit from your vote, meaning you will benefit less. There is a game in there. if large voters vote before, you will gain less, if a large vote votes after a small vote, the small vote will gain more. It is possible to get 300% or more curation returns.

One site you can use to see lots of account information is this:
https://steemworld.org/@arthur-grafo8

What I would enjoy seeing is someone buy much more than a million and have their fun posting, upvoting a few deserving small posters while earning and flagging all those who flagged him when he was a small fish.

I find this very immature :)