Sure, they're extremely plentiful. Costco distributes food under the "Kirkland Signature" brand, competing with its own suppliers. Uber was started by using a

Sure, they're extremely plentiful. Costco distributes food under the "Kirkland Signature" brand, competing with its own suppliers. Uber was started by using a towncar service and getting cars dispatched. They now hire their own drivers directly. Old fashioned steel companies were famous for owning the entire supply chain, all the way from the coal and iron mines and the rail roads through the steel factories. Google is (attempting) this move by creating a review service to eat Yelp's lunch and displace them as a supplier of reviews to people searching Google. Netflix creates House of Cards to compete with its own suppliers of movies.