أكبر البلدان الذهب والنحاس وخام الحديد في العالم لإنتاج ...

جنوب أفريقيا التعدين ريدج Unit Economics Sam Altman. I think the answer is unit economics One of the jokes that came out of the 2000 bubble was we lose a little money on every customer but we make it up on volume This was then out of fashion for a long time as Google and Facebook hit their stride There are now more businesses than I ever remember before that struggle to explain how their unit