What's the point of having Karma points? I don't think anyone pays attention to them.
Don't forget that your karma can be seen by everyone as a token of trust: the higher it is, the more trustworthy you are
I think the rank/number of posts an Expat makes and how long they've been registered usually is a first indicator of how trustworthy a person is more so than karma stars. The content in one's post actually shows how knowledgeable a person is...giving good factual advice gains trust...spewing unverified opinion doesn't.
Like, I think I just earned 1 star today but have no idea how I did it nor do I care. People trust me because if I am uncertain about an answer, I google verify it.
Why don't we do something more with Karma points like earning Expat-Blog T-shirts or something. Actual rewards such as souvenirs will probably entice people more to pursue karma stars/points (i.e. a pen, coffee cup, autographed photoshopped photo of Julien shaking hands with Expat-member).