Yesterday Instagram announced that it has 200 million users for stories, which exceeds Snapchat’s 160 million users from their S-1 filing. Never mind that nobody outside these companies knows what those user definitions really mean or how to compare them. This has nonetheless rekindled a debate about copying that periodically arises in the tech industry. For a previous instance, take the outrage over Rocket Internet’s copying of US businesses for Europe and also Asia. If you want to go much f...