Just starting this topic, because @ulni just had this idea to solve low participation in contract upgrade votes and such (when large majorities would be required). So: Voting could earn you kredits, essentially rewarding participation in governance.
(Please note that it’s one of the main goals of the Kredits system/model to avoid voting as much as possible in the first place. So this would only apply to very few things in the end, but could certainly help with those.)