In order to fight agains't unfair players who let the games run out, each player unfairness will be evaluated at the end of the day.
We take account expired games on your turn vs fully played games.
Example: if I play 100 games and let 10 run out, I will have a value of 10.
Values between 0 and 5 (inc) will be considered "green".
Values between 5 and 10 (inc) will be considered "orange".
Values above 10 will be considered "red"
Thoses colors will appear very soon in the players list and on every player's profile.
I've had a problem myself a few times, when I'll ask someone to play, and then later rather getting a reply from them, getting a message saying the game has timed out. Is that an error on my side or on the games side? I'd hate to be anything but green if I can help it.
First, to answer someone's question, no, you'll not get a lower rating if the match has not begun and it expired.
Second, the info when -receiving- challenges will be added soon.
Third, not answering challenge will not be "the new way to beat the system" as it is really not useful to be in a game just to
"not answer challenges" (and you cannot send a challenge if you haven't answered a waiting one).
And last but not least, as already said, in ELO, if someone let the game timeout, he will be -punish- at the end of the day
(severly). (and the ratio of "timed out" games in elo vs "correct" games in quite fine)
You have to understand that it is NOT possible to avoid all the problems if some people just don't want to play fair.
For example, some people dont "let the game timeout" as a strategy but simply quit because they don't like to lose, over time
they will become orange, then red, and nobody will want to play with them.. maybe they will learn
With over 600 players connected at time, I'm sure you'll be able to find the right peoples.