Age out games by date, not number of games

The 90th game played in a month has a lot more impact on your current rating than the 90th played two years ago. Furthermore, it appears PB applies the aging algorithm to the current selection. That is, your 90th game has no impact on your rating, but if it appears in a filter of 10 games, it has the highest impact. The same game shouldn’t have different levels of impact based on what folder you’re looking at.

I suggest giving games a 1-year lifetime, making a 6-month old game 50% impact.