Wich is better, sales with Long tail or selling much from the first week and fading away?

[invetedlotus123]

Sure if a company can get both its the better. But it is better for a game to sell,  like, 5 million within two year steadily selling weekly or to sell a lot first week and month and not holding legs? In West most game even with big releases seems to hold legs well, but in Japan sales tend to be extreme front-loaded thanks to the used market.