Also a notorious case: Final Fantasy XV famously could run the full game using the demo binary, this is how it was "cracked" before launch, when players realize

Also a notorious case: Final Fantasy XV famously could run the full game using the demo binary, this is how it was "cracked" before launch, when players realized the demo binary could run the preloaded content before release. Only AFTER the official launch, performance complaints started, then people realized the official launch binary, that has Denuvo, has performance issues, while the demo binary, that has no DRM, runs perfectly fine, using the exact same data.