Wow Gooner, a lot of these were questions I had as well and I really appreciate the amount of time it takes to put all this info down. Thank you very much. I promote bonuses heavily and incorporate reviews as well, although I do believe my site to be above average. Your analysis has much more aged data, and data that has much larger numbers in general making it more mathematically accurate than analyzing my best site.
My point is that I find your numbers to be dead on even with a smaller number of players and in a targeted USA demographic that I have as a comparison. I just wanted to back your post with the fact that I am finding similar traits regarding my players behavior as well.
(edit reason: typo)