I'll upvote any constructive interaction, but I think a big reason why aggregators got popular was the ability for a user manifest their general disagreement with something in a way that can impact the visibility of that info. So I don't think the overall nature of upvotes/downvotes could manage to be substantially different to Reddit or any other aggregator. The user behaviour is ultimately determined by the availability of the function, rather than the nature of the community that uses the platform/function