Storefront Brief issue 7: Product Page Optimization in App Store Connect — organic A/B tests on the default page

English issue: Product Page Optimization (PPO) lets indie iOS teams run Connect-managed A/B tests on app icons, screenshots, and app preview videos against the default product page — treatment vs control, traffic split, conversion metric, 90-day cap, per-locale treatments. Organic experiment layer separate from Custom Product Pages (Issue 5) and In-App Events (Issue 6). Wait for any live event to…