Anyone ever notice Voobly's "Graveyard of the 2k's"?

On the 1v1 ladder, it says:

Players decay 25 points every 14 days of inactivity down to a limit of 2000.

To that end there are hundreds upon hundreds of players with ELO 2000, stretching from rank 138 to rank 542 on the ladder, most of them inactive for years. A little sad. How could they walk away ? And how could they not come back now, when we have a dozen new civs more attention than ever?