Preseason weighting.

I'm currently sitting at gold V, on like 130 games-ish (don't play often (full time at uni)). The main time I have spare is between years which coincides mostly with preseason. So what I am more or less asking is that, hypothetically I can climb, for the sake of the stats lets say to platinum. How will this 'preseason' rank weigh and then compare to how the initial placement / 10 placements will effect. (Basically will the soft mmr reset disregard preseason climb) if this makes sense. Cheers. {{champion:27}}
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