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For now yes, but it's looking like in the next hardfork STEEM will have a free downvote pool too.

Free up to the exhaustion of the Downvote pool... which afterwards would consume from the normal rewards pool (just like now).

So, it will be interesting how people abuse or not of the downvote pool... I see bots will probably be constantly using this pool. So, how to solve that problem is already a concern to me.