How division-boost pricing actually works
Division boost pricing isn't linear with distance.
It scales with the difficulty of the tier you're climbing through.
Iron-to-Silver costs $15-25 total (one of the cheapest segments). Silver-to-Gold is $30-50. Gold-to-Platinum is $50-80. Platinum-to-Diamond is $80-150 (the curve steepens). Diamond-to-Master is $150-300. Master-to-GM is $300-500. GM-to-Challenger is quoted on request. The reason: higher tiers have stronger opponents, and Grandmaster and Challenger only have a limited number of places per region.