Left of the Long Tail

Now I know everyone has heard the hype about this but I may reinforce this that there are probably more examples than not that the:
Head (or Hump) of the Long Tail is subject to the Law of Diminishing Returns!

https://en.wikipedia.org/wiki/Long_tail
https://en.wikipedia.org/wiki/Diminishing_returns

Increasingly gives greater weight to the idea that in the Connected World business we should focus on increasing the volume of Customers!

Feel free to Comment with all of your interesting examples!