Here are some facts John Crestani is a businessman and entrepreneur who shares how he became successful in his own businesses. Over the last 10 years. John has built multiple successful online businesses that generate millions per year. John also founded an INC 5000 Digital Marketing Agency, which helped his clients generate billions in sales. Not only is John known in the online business community, he helped 50,000 people create awesome lives by having their own success stories in successful businesses.