It seems PQ3, as against normal games, want their players to spend less time on the game. How else can one explain there being just 2 empty slots for chests Golden and above. Golden keys one can get without that much difficulty. Ruby and Diamond keys are abnormally expensive. Otherwise one has to send the minions. They take a full 12 to 24 hours to open the chests.
Once two chests are, let’s say ‘booked’, one must either stop playing, or else waste (salvage) any ruby or diamond chests that one gets later.
Finally I do not play much and am not much of an expert in this new game. So if there are any other ways to circumvent this dilemma, please enlighten me.