I got excited by your post because I'm building a reddit-clone too.
It's called Dinomia and it's a just-for-fun concept with a transaction system.
Each time you upvote something an "upvote / credit" is transferred from you to the author of the post, like sending money.
When you create a post/comment/community you loose X "upvote/credits" etc.
I hope Ieddit has great success and congratulations again for the work you have done.
Not all information are avaiable on GitHub UI, please read all the comments in the discussion;
if you're still not convinced you could suggest something you would like to see on the site. This is the purpose for which I submit the discussion.