Twitch keeps you hooked by mixing smart personalization with gaming mechanics....

https://dibz.me/blog/beyond-the-cookie-how-platforms-measure-engagement-without-sacrificing-user-privacy-1167

Twitch keeps you hooked by mixing smart personalization with gaming mechanics. They sync your progress across devices and simplify payments with digital wallets. By using analytics to foster community, they build a space tailored to your habits