The Roman version of Ray Kroc.
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The McDonald brothers invented the fast serve layout (the design of which they sold to anyone for $900), but only had one store until Croc bought them out for 2.7 mil (23mil today). Croc then went on to franchise and make the business into what it is today
Actually I think Kroc was a restaurant supply salesman and they were one of his customers.
He came by the store to find out why they were ordering so many milkshake machines. That’s when he saw how busy they were.