...I think right after updates is not the best time to find EMs in the DD.
Indeed, especially deeds, mallets, and markers given the new unlocked land don't need the extremely rare expansion permits which were introduced in the March 2017 update. I'm speculating Team Hay Day thought it was one of the ways to slow down bot activity and unauthorized selling of deeds, mallets, and markers. Impatient players may buy as many they want but they can't unlocked new lands containing exclusive decorations until they save enough expansion permits gained from playing the derby, spinning the WoF, and opening the Mystery Boxes.
Four years later, Team Hay Day have reviewed their internal data and seen players holding onto too many deeds, mallets, and markers so they want players to use them to unlock new lands in the June 2021 update without the need for expansion permits. Now players must replenish their stock of deeds, mallets, and markers by buying them from HD or playing HD more often.
Again, the above are my speculations.
"...But at my back I always hear Time’s winged chariot hurrying near..."