You could get something like 10% of the karma of an article if you upvoted that article before it reached the frontpage and that article gets more than a certai

You could get something like 10% of the karma of an article if you upvoted that article before it reached the frontpage and that article gets more than a certain threshold (say: 100 points, which would somewhat mean that the article is good. That way you get some of be benefits of the submitters, but not all. A bit like being an early employee at a startup. However, people could just upvote all the newest articles without reading it and get the karma from the ones that end up scoring well, so that system wouldn't be perfect.