So here's the deal. I am not going to maintain this (well, big surprise, I've already lapsed). What you (AI/rd) can't see is that there definitely aren't 21 people using this. Well, there weren't, more precisely. With much regularity, there were like 4-5. I think it's tedious for most people. It's certainly tedious for me. Sure, int he perfect world where I could just totally automate everything, it wouldn't be an issue at all. But that is not something that I'm going to be able to do anytime soon. Indeed, it's all very nice for you to say that I should continue this, but you aren't the one who is bearing any of the costs. Actually you aren't bearing any of the reward, either, from what I can see, so I don't really get what your point is, but whatever. This is a free service that I was providing entirely voluntarily, and I basically thus don't need any reason to stop providing it. It wasn't actually worth all that much anyway, as a rating pool largely based on so few players is pretty miserable. By far the best thing about it was just getting the data, but you've gone a long way in doing this, but on a bigger scale, which in large part obsoletes this.
The point is that it is tedious for me, and while you can say 'do it more efficiently', this doesn't make me able to do so.
Anyway, I am getting busier in RL, and this is just a very easy cut to make.
I would still like to work out what a 'fair' curve for Win Expectancy should be for the game, and maybe I will pour some more time into this at some point, but it probably won't be until August, at least, and more likely December or later.