This is their privacy website.
https://www.epicgames.com/site/en-US/privacypolicy
Of particular note is section 2
(2) Information Collected Automatically When You Use Our Websites, Games, and Applications
We collect some information automatically when you visit our websites or use our games, game engines, and applications. If a combination of information that we collect does identify you as an individual, we will treat the combined information as personal information. We typically aggregate the data that we collect automatically and use it in statistical form to determine trends among groups of users, rather than using it to identify individuals.
We collect information automatically through technologies such as web browsers, cookies, log files, web beacons, and our back-end servers collect usage data transmitted from our games and other software. We use the information for purposes such as modifying or improving features, managing advertising, addressing technical issues, preventing fraud or misuse of our services, and conducting data analytics. The type of information that we automatically collect may vary, but generally includes:
- Technical information about your computer, device, hardware, or software you use to access the Internet or our services, such as IP address or other transactional or identifier information for your device (such as device make and model, information about device operating systems and browsers, or other device or system related specifications);
- Usage information and statistics about your interaction with our websites, games, game engines, and applications, which may include the URLs of our websites that you have visited, URLs of referring and exiting pages, page views, time spent on a page, number of clicks, platform type, the application you used or the game you played, how long you used or played it and when, and other usage statistics;
- Crash reports, which may be automatically generated when a game or application crashes and includes information about your system and the crash;
- Information that facilitates a safer and more personalized experience, such as your display name or other user identification provided in connection with your application use or game play, saved preferences, game progress, and device identifiers or usage information for authentication and fraud prevention purposes;
- The location of your device, such as may be derived from your device's IP address.
Please note that if certain features on our website are provided by third parties, those third parties may also use automated means of data collection and may record information about your use of our website or others' websites over time. These features are subject to those third parties' privacy notices and policies.