Additive bonuses (+12 fixed points) didn't scale with the blended
score range. Log-compressed popularity puts most scores in a narrow
80-92 band, making +12 disproportionately large.
Percentage multipliers scale naturally:
Artist: exact +15%, starts-with +8%, substring 0%, none -15%
Album: credit-exact +15%, credit-contains +10%, title-exact +5%,
title-contains 0%, none -10%
A tier-0 exact match with blended score 86 gets 86×1.15=99.
A tier-1 starts-with with blended score 92 gets 92×1.08=99.
The 4× popularity gap exactly offsets the 7% tier advantage —
proportional behavior where the boost scales with the artist's
existing score rather than being a fixed number.
yonlu
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