People who don't wanna party up for the ranked ones?
People who just wanna go at the hunt without much effort/rage/hate?
People who just plain can't do the ranked hunts?

To make people like you ask silly questions?

Reasons errwhere, yo.

The rewards are low because they require practically nothing to complete.
I do them.
SE doesn't care what you or anybody else does, and yes, you are missing something.