You are doing some incredible work. I think generally your hypotheses are correct although I am not sure we have figured out what the optimal posting fee is and if it depends on the territory (which would make sense- if you are posting a short story or a long form opinion piece that isn't a regular thing you are probably happy to pay more to post than if you are just posting a link to a news article). I think up to 100 sats posting fee probably doesn't change anyone's behaviour but I do recall the original health territory had a 1k sats posting fee and I know personally I didn't post in that territory because I felt it was too high. Even if I thought I would get more than 1k sats back from the post it seemed excessively high compared to other territories.