Why do people lose interest in Discovery.

[Camtheman]

it is easy to reach goals and people who are objective-focused get bored quickly.

What goals? Money goals? Of course, the Discovery economy is just like an MMO.

Grind enough and you will get what you want eventually.

Of course, if you've tried setting and meeting an RP goal (like becoming Administrator of Freeport 11, wink wink)

It's much, much harder and is much much less boring than just grinding for pixel ships.