Yelp just paid 20 million dollars for Turnstyle Solutions, which specializes in tracking retail customers with the WiFi signals sent by smartphones, without ask

Yelp just paid 20 million dollars for Turnstyle Solutions, which specializes in tracking retail customers with the WiFi signals sent by smartphones, without asking for the phone customer's consent. If you want to opt out, you have to go out of your way to register your device's mac address with them. https://www.wsj.com/articles/what-secrets-your-phone-is-sharing-about-you-1389663783 https://www.wsj.com/articles/what-secrets-your-phone-is-shar... https://techcrunch.com/2017/04/04/yelp-acquires-wi-fi-marketing-company-turnstyle-analytics-for-20-million/ https://techcrunch.com/2017/04/04/yelp-acquires-wi-fi-market...