Twitter takes the wrapping off its subscription product, Twitter Blue. Multi-device support hints at a future WhatsApp app for iPads. Stack Overflow is the latest part of the developer ecosystem to sell for big bucks. And taking the temperature of Google’s Ethical AI team.Sponsors:Metalab.comCybereason.comLinks:Twitter launches its first subscription service (CNBC)Apple asks staff to return to office three days a week starting in early September (The Verge)WhatsApp to Roll Out Multi-Device Support, Hints at Future iPad App (Mac Rumors)Cybersecurity firm NortonLifeLock will let customers mine crypto (CNN)Stack Overflow Sold to Tech Giant Prosus for $1.8 Billion (Wall Street Journal)Google says it’s committed to ethical AI research. Its ethical AI team isn’t so sure. (Recode)See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.