No se a el, pero a mi se me ocurren mas de 300 razones, y solo es un pequeño ejemplo:
Google Analytics, Facebook, Twiter, 3DStats, Adara Media, AddFreeStats, AddThis, adhood Analytics, AdPlan, Alexa Metrics, Alexa Widget, Anormal Tracker, AWStats, BackType Widgets, Beencounter, BelStat, BloomReach, Bluemetrix, BLVD Status, Branica, Bubblestat, BusinessOnLine Analytics, Buzzster, C3 Metrics, Cedexis Radar, Certifica Metric, Channel Intelligence, ChannelAdvisor, ChartBeat, ClearSaleing, ClickFuel, ClickInc, ClickTale, Clicky, ClixMetrix, Clixpy, ClustrMaps, CNZZ, ConversionRuler, Coremetrics, Crazy Egg, crmmetrix, Crowd Science, DC StormIQ, Degaa Analytics, Demandware Analytics, Didit Blizzard, Didit Maestro, DomoDomain, DoubleVerify, Econda, Effective Measure, Eloqua, Ensighten, eProof, eStat, etracker, Eulerian, expo-MAX, eXTReMe Tracker, Feedjit, Fireclick, Footprint, ForeSee, Free Online Users, Gaug.es, GB-World, GoDaddy Site Analytics, Google Website Optimizer, GoSquared LiveStats, GoStats, Gravity Insights, GTop, Histats, Hit-Parade, HitsLink, HitSniffer, HotLog, HubSpot, HubSpot WebsiteGrader, i-stats, i.ua, iCrossing, IndexTools, INFOnline, InsightExpress, Inspectlet, IntelligenceFocus, iPerceptions, JS-Kit, Kenshoo, KeyMetric, KissInsights, KissMetrics, LeadForce1, LeadFormix, LeadLander, LineZing, LiveBall, Logdy, LXR100, Lynchpin Analytics, Lyris ClickTracks, Lytiks, Marketo, Marktest, Media Innovation Group, Meetrics, Mint, MixPanel, Monetate, Motigo Webstats, Mouseflow, MyBlogLog, MyCounter.ua, MyPagerank, Nakanohito, Navegg, NedStat, NetMonitor, NetRatings SiteCensus, NetUpdater, New Relic, News Registry, NextSTAT, Ninja Access Analysis, Nuconomy, Observer, OneStat, Onlinewebstat, Openstat, Opentracker, Optimost, OrangeSoda, Outbrain, OWA, PercentMobile, Phonalytics, phpMyVisites, Piwik Analytics, PostRank, RadarURL, Reinvigorate, SageMetrics, SearchIgnite, SeeVolution, ShinyStat, Site Compass, SiteBro, SiteMeter, Skribit, SkyTide Anlaytics, Snoobi, Sophus3, Spring Metrics, stat4u, Statcounter, Statisfy, statistics.ro, Statsit, Stratigent, Sweepery, Tealium, Tinystat, TNS, TouchCommerce, TrackingSoft, Trackset ConversionLab, Trackset VisualPath, TradeTracker, Trafic, Trovus Revelations, TruEffect, TwitterCounter, Typepad Stats, Unica, Uptrends, Usability Sciences WebIQ, Vertster, VG Wort, Visible Measures, VisiCogn Collection, VisiStat, Visit Streamer, VisitorVille, vistrac, Visual Revenue, Vizu, W3Counter, w3roi, Web Traxs, Web-Stat, WebGozar, Webtrekk, WebVisor, Wipe Web Anlaytics, WiredMinds, Woopra, WOW Analytics, WysiStat, XGraph, XiTi, Yahoo Analytics, Yahoo Search Marketing Analytics, Yandex.Metrics, YellowTracker, ZigZag, AdBrite Notice, AOL OBA Notice, Chitika Notice, CookieQ, Dotomi Notice, DoubleVerify Notice, Evidon Notice, Fetchback Notice, GDN Notice, Microsoft Notice, Pulse360 Notice, Quantcast Notice, Specific Media Notice, TRUSTe Notice, ValueClick Notice,2leep, Acerno, Act-On Beacon, ActiveMeter, AdBull, Adhere, AdInsight, AdInsight Clarity, Adnetik, AdOcean, AdPredictive, Adroit Interactive, AdXpose, Aggregate Knowledge, AliveChat, Amadesa, AppMetrx, ATG Optimization, ATG Recommendations, Audience Science, AWeber, Barilliance, Baynote Observer, bigmir, BlogFrog, BlueCava, BlueKai, Brainient, BrightTag, BTBuckets, Chango, Clickability Beacon, ClickAider, ClickDensity, ClickDimensions, ClickEquations, Cognitive Match, Collarity, Communicator Corp, Conversive, Convert Platform, Convertro, CoreMotives, Cross Pixel Media, Datran, Demandbase, Demdex, Direct Response Group, Dotomi, DoubleClick Floodlight, DoubleClick Spotlight, DSMM Advantage, dwstat.cn, Dynamic Logic, Emediate, Engagd, Enquisite, eTrigue, eXelate, Facebook Beacon, Fathom SEO, FeedPerfect, FriendFeed, Genius, Gigya Beacon, GoDataFeed, Gomez, Grapeshot, HitTail, Hurra Tracker, i-Behavior, Intent Media, InternetAudioAds, iProspect, Kampyle, KeywordMax, Krux Digital, Legolas Media, Listrak, Loomia, LoopFuse OneView, Luminate, Magnetic, Magnify360, MailChimp Tracking, Marin Search Marketer, Maxymiser, mediaFORGE, MediaMind, MerchantAdvantage, Mirando, Mobile Meteor, Monitus, My Things Media, Net-Results, NetBina, Netmining, Next Performance, Olark, Omniture, Omniture TouchClarity, Optify, Optimizely, OwnerIQ, Pardot, Parse.ly, Peer39, Peerius, Peerset, Performable, PersianStat, Predicta, PredictAd, QuBit OpenTag, Quintelligence, RadiumOne, Rambler, RapLeaf, ReachLocal, Red Aril, ReputationManager, Resonance, ReTargeter Beacon, RightWave, RKG Attribution Management, Rocket Fuel, ROI trax, Salesforce, ScoreCard Research Beacon, SearchForce, SearchRev, Seesmic, SingleFeed, Smowtion, SnapEngage, Spectate, Steel House Media, Struq, Summit Media, TagMan, TargusInfo, Tell-a-Friend, TellApart, Teracent, The Search Agency, Think Realtime, TidalTV, ToneFuse, TraceMyIP, TriggIt, Trumba, Tumri, TweetMeme, Tynt Insight, Tynt SpeedSearch, UberTags, uCoz, Unbounce, VerticalResponse, Veruta, Vindico Group, Visual Website Optimizer, VoiceFive, Webclicktracker, WebTrends, WidgetBox, Wordpress Stats, XA.net, xplosion, zaparena, Zemanta, Zendesk, Zopim
Cada vez que un webmaster añade un javascript externo, de google code, botón de facebook o twiter, etc, le están dando tu perfil. Con ip dinámica el trabajo se les hace menos llevadero... haciendo mas enrevesado controlar el "trozo de carne" :)