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The weekly member of Meta's people-metric family, alongside DAP and MAP. Excerpt #605 measures a registration change as "-174k WAP@14" and converts the same effect to "18.4M MAP/year", which only works if WAP counts the same way MAP does. DISAMBIGUATION: in excerpts #454 and #515, "the TikTok WAP trend" is the song, cited as an example of a risky trend for teens. Same three letters, unrelated.