PS. Kiwi.com did not sponsor this... it is simply my own opinion

Well, maybe they can sponsor you in the future. :)
$8 afters 4 years is basically nothing. I have the same experience with shopping in supermarkets. They give you points and then you can get tickets for the cinema etc. Afters 5 years you have enough points, and you can finally watch a movie, what the he..?