How often do you see Bitcoins or Litecoins at the very top of the profitability charts?
Answer: For all practical purposes, Never.
Why do people mine Bitcoins and Litecoins even if they are not at the top of profitability charts? No, it is not because they are stupid. It is because they are stable, and the miners believe in the long-term growth prospects of the coins. This was the original reason, before altcoins existed, that people would set themselves up to mine Bitcoins. Oscillations caused by minute-to-minute shifting in where mining takes place is purely destructive, because it introduces a variance between estimated hashing rate (determined by measuring actual hashing that is occuring), and actual hashing rate. This variance occurs, because when the difficulty swings upwards, due to competiton for short-term hashing resources, a huge number of people stop mining the coin; and when the difficulty swings downwards, there is a huge influx of temporary hashing power. This creates a destructive oscillation, which prevents the block time from stabilizing at the intended level. If you take away just this one factor (destructive oscillation), you achieve the same stability in difficulty levels you see in Bitcoins and Litecoins, and attention can be focused on promotion and marketing. The same code can be lobbied to be back-ported to Bitcoin, and then we would be back to exact-clone status again, which has a certain amount of marketing appeal. I submit that people who love and thrive on the wild oscillations of altcoins are more interested in gambling than in promoting long-term value of the coin, and there are plenty of altcoins out there they can gamble with, and there is nothing wrong with choosing to take this coin out of the realm of their gambling, if in doing so, we expect the coin to gain value.