Whilst I realise the earth isn't a perfect sphere per se due to variations in the altitudes of its geography (mountains, plateaus, valleys, lowlands, etc.), I have often wondered whether the balance of its spin is shifted "out of whack" by such things as:
the digging up and shifting of physical resources from one part of the planet to another
the conversion of physical resources into commodities which are then sold around the planet
large shifts in populations due to political unrest, emigration, refugee crises, wars, pandemics, etc.
changes in albedo effects due to deforestation, bush-fires, water pollution, etc.
Any thoughts...??? Just wonderin'...????