We sell school and university discounts. A school gets an allocation: a code its students can redeem, capped at some number of redemptions, and the cap resets each year. Each year, but not each calendar year. A sixth form's intake arrives in September. The cohort that used the allocation in the spring has left by the autumn, and resetting their cap on 1 January means resetting it in the middle of application season, which is the worst possible moment for the people relying on it. So the re...