ICSI in The Wall Street Journal

TikTok Tracked User Data Using Tactic Banned by Google​
August 11, 2020 | Kevin Poulson and Robert McMillan, WSJ

Most major mobile apps collect a range of data on users, practices that privacy advocates have long found alarming but that tech companies defend as providing highly customized experiences and targeted advertising. Data collection varies by company. About 1% of Android apps collect MAC addresses, according to a 2018 study by AppCensus, a mobile-app analysis firm that consults with companies on their privacy practices.