I'll try to explain it simply, even though the exact mechanisms behind are a bit more complex:

• every day there is a fixed amount of rewards available to be shared by everyone
• everyone's upvotes/downvotes reallocate the shares of the pie between all the votes: when you upvote someone's post, more rewards go to him/her, and that much less to everyone else. When you downvote, the opposite happens: less to him/her, more for everyone else. So when haejin rakes $2000+ / day, that is that much less that goes to everyone else. When I downvote his posts, I do not do it in order to "censor" him, but because I believe he's receiving a disproportionate share of the rewards pool that I feel should be given to other deserving people
• note that I use downvote instead of flag as I believe it better represents what happens, as flag carries a very negative connotation that it doesn't have in the code

As for downvoting comments, I won't be doing that. Hope it makes things a bit clearer.