Drafts cannot use duplicate protection in the drafted packs for several extremely obvious reasons having to do with fundamental game-play mechanics. You can't remove cards from the drafting pool lol. And they can't just make them free wildcards after the fact either, because that would reduce the rake to a reasonable level.
I had just expected they'd convert extra Rares after the Draft event. To me that's the obvious solution.
However, I have to make some amends. According to FK's studies, Bo1 Draft, which is my primary money sink, is the worst of the bunch. He values the 3 opened packs at 577 gold each, so we spend 5k for cards worth 1.7k + rewards. Since the rewards even at zero wins contain 1.2 boosters, that's another 1.2k of value and 50 gems, which are a quarter pack, so 250 gold. So we roughly lose 1.8k gold on a 0-3 Draft compared to buying boosters.
I argue that even that is bad. Why should one be punished for playing bad limited? No one gets punished for playing bad constructed. Is limited some exclusive high roller content? I doubt that, more like the opposite.
However, even at 3-3 you lose gold compared to buying boosters as per FK's assumptions and that's just a crime. There's no justification at all and the reason I made the effort. Remember there is no difference in how much money they make based on
what we spend our ingame-currency on. We spend it on boosters or events. And from a gamer's PoV the latter needs to be better - in every case. If a booster was 2k/400 gems, someone else would complain, but not me. I only care about the relation of those two because that makes me feel bad whenever I spend gold on Draft instead of boosters.