I mean, what products are even unique to Google or Meta? The cloning is already done and the cloners are established businesses. Or, Google just cloned someone else. Did they independently discover cloud computing and make GCP? I think not.

This is a fair point. After 5 failed startups (you'd think id learn and give up) building products and velocity had never been an issue. "Selling" is the one absolute North Star. Even if you built a feature-to-feature clone - as another commenter above pointed out - sales (or lack of it) has been the biggest differentiator.