The allSameScore guard prevented the LB popularity lookup from
firing because the blended scores differed slightly (40 vs 37)
even though both had zero index popularity. The small difference
came from different MB relevance scores (100 vs 93), not from
meaningful popularity data.
Removed the guard entirely — the LB lookup now always fires for
2+ same-named artists in tier 0. The cost is negligible (one POST
with 2-6 MBIDs) and the result is always correct.
yonlu
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