Simon Willison’s Weblog

Experiments, growth engineering, and exposing company secrets through your API (via) This is fun: Jon Luca observes that many companies that run A/B tests have private JSON APIs that list all of their ongoing experiments, and uses them to explore tests from Lyft, Airbnb, Pinterest, Amazon and more. Facebook and Instagram use SSL Stapling which makes it harder to spy on their mobile app traffic.