Originally posted by EminentStudent
Both systems can be exploited. The current system (which takes the END ratings) can be exploited by the player who loses the game and the alternate system (which takes the START ratings) can be exploited by the winner (in the way you described). But can't we have a hybrid system which takes the END rating for the winner of the game (to ...[text shortened]... to block both exploits (unless it leads to certain inconsistencies which I've not thought of).
Read your first example... but now waiting for a players rating to go UP, you see they are some lost games and wait for it to go down.
Ratings go up and down all the time.
No one is going to break the bank 'gambling' that any given user's rating may go up or down.
A rating is just a number to gauge how well (or poorly) you play chess. Having this number inflated will only bring it tumbling back where it belongs in the next few finished games.
Don't let it bother you, regardless how you do it there is a way to exploit it if you like... just remember it WILL go back where it belongs eventually.