"Winnings" in that article refers to gross winnings, not net. Which is meaningless obviously. People didn't net 2 billion either. The reporting was just so bad. I dunno if that was intentional or not.
Mostly amounts to fake news but obviously every article about all that stuff was highly embellished because that's what the media does. I didn't feel like explaining it to people in 2015 because it was incredibly polarizing to some since they HATED the commercial onslaught (which was obv fair, companies were stupid to blitz that hard) but the controversy about that Ethan kid winning 300k was pretty trumped up.
You can't really get information from working at draftkings and just log-in on fanduel and crush the site. Hell if you could, I'd pay some low level employee to give me that info, lol.
That being said, they don't let people play on each others sites anymore if they're employed by the company, as much as they can stop it mostly for optics purposes. Obviously you could get your friends or family to play on the site if you truly had superior info, but just knowing Leveon Bell is gonna be 30% owned in a big tournament isn't having superior info.