From one of the palace's windows, Speedrun saw Mistress and her subordinates leave the palace. He didn't care what those people were doing, but the palace had become even emptier with them gone. He could freely move around.
He continued walking around the halls looking for valuable items. Normal people might think that if there were any treasures inside a palace ruled by a player, those treasures would have been taken already. A player had an inventory system, they could store valuables in their inventory rather than letting these valuables lay in the open. Players' inventory system might have limited space but there were some ways to solve this, such as the bank or guild vaults. Hence, most would think what Speedrun was doing to be pointless.