X Corp, formerly known as Twitter, and its former mobile advertising platform MoPub are facing a class-action lawsuit in The Netherlands alleging unlawful user tracking, data collection and sharing, TechCrunch reports. The lawsuit claims X Corp and MoPub, which is now owned by AppLovin, "unlawfully collected and exchanged user data from over 30,000 free mobile applications in the Netherlands" from October 2013 to December 2021 in violation of the EU General Data Protection Regulation.