If I’ve done my math right, that’s the total of the “Days since last played” on the Friendless “Games you should play soon which you own,” list and that number is growing by 20 per day (since there are twenty games on the list). One of my new years resolutions is to reduce that number. My goal is to have no game listed with 1000 days (which means I play my collection through every 3 years-ish).
Now, it’s not a hard rule. But it’s a guideline. Get more games to 50 plays, get rid of games on the “GYSPSWYO” list. (In some case, by getting rid of the game, if I no longer care about it).