nx_ad_view.nx

nx_ad_view.nx -- LIB (PURE, no I/O): honest VIEWPORT-VERIFIED impression counting for the "Brought to you by" ad engine. Counts ONLY genuinely-SEEN impressions to the MRC standard (>=50% of an ad's pixels in the viewable area for >=1 CONTINUOUS second display / >=2s video) -- NEVER served-but- unseen. This is the "evidence & science, no fake impressions like Google/others" honesty law applied to ad measurement: the named exceed axis vs incumbents' inflated serve-counts. Also records WHERE on the page (slot class) so delivery placement is transparent. [bar: srch_adview.raw -- MRC viewability] PRIVACY BY CONSTRUCTION: inputs are AGGREGATE buckets [viewed, slot, dwell_ms, n] -- NO visitor id, IP, or fingerprint. The first-party client runtime measures 50%-in-viewport + continuous dwell and posts only an aggregate bucket; this organ owns the COUNTING RULE (count iff viewed AND dwell>=min). Mirrors nx_ad_botfilter's aggregate class-bucket shape -- "filter unseen" can never become "track people". license_tier: ORIGINAL