Shroud of the Avatar did a special POT upgrades sale for all elite players that already own one of the Player Owned Towns. Portalarium wanted to celebrate smoking pot with their players so they gave people that already owned these towns a chance to upgrade them at a discount which is good since some of these towns sell bare bones with no land deeds or houses for $6k from the cash shop.
This sale was only for the 350 players that already owned one though because they are a retired item. You can buy them on the player economy but they cost a lot more than $6k, which is weird because the game is empty.
Did any other games did anything to celebrate being a cannabis user on 420.