More than 70,000 websites belonging to Fortune 500 brands, government agencies, and universities share consumers’ data with Twitter using data tracking code hosted on these other organizations’ websites, according to research published on Thursday by Adalytics. Twitter, like most other digital advertising platforms, offers free snippets of Javascript code that, along with a single pixel embedded in pages, tracks users so advertisers can send targeted ads.  These trackers have landed other tech giants – including Meta, Google, and TikTok – in trouble for breaching consumer privacy rules by collecting sensitive personal data.

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