i dont think ive ever heard of someone being promoted unless theyre at least in top ten of the division unless they have like 80-90% win ratio though. i know ive personally never been promoted outside the top 5?
that's because if you maintain a consistent 60%+ winrate and use up all your bonus pool, you're likely to get to top of your division simply by virtue of being a side effect of a higher MMR.
you can get to the top of your division just by having 50% winrate and spending all your bonus pool. How many top diamond players (for example) do you see each season with 300ish wins and 300ish losses? They aren't close to Masters, despite what they may think. The people close to Masters are the people below them with 100 wins and 70 losses.
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