In the ballpark ($2-4 billion in the 1970s): https://priceonomics.com/how-the-hunt-brothers-cornered-the-...
17,656 karma · joined October 5, 2007
Also Guy Kawasaki probably isn’t the first to say this, but I’d guess he predates Zuckerberg: https://guykawasaki.com/the_art_of_the_/
I don't think that indicates that any one company interviewed him 20+ times.
I’ve always been a Porter guy when it comes to business strategy though. https://en.m.wikipedia.org/wiki/Porter's_generic_strategies