1000 Actually. :p

Also yes, in your example Player A would get 200 points for winning, player B would only get 10. If possible I would also like to look into a possible flexible "wager" system. 10% is standard, but it would be interesting if players could determine the amount of points themselves. 

As far as inactive people, we would just have to have a work around for that. I don't see it as a big problem, except to where it comes to rankings themselves. Any ideas?