Right. Bu they said he wagered $45K. So, in your example he wagered $300. If he’s only betting in those increments, he’d have to make a LOT of bets. You make a good point on some bets have great returns, but those are generally losers.
IMO, to have wagered $45K over the time period, he would have had to put up $25K+ of real money (not just winnings), because it isn’t realistic to think he was a good enough bettor to be able to wager $45K with a small bankroll (no one is).
That’s why I think a.) those numbers are wrong b.) he’s making bets for others or c.) he’s got a sugar mama somewhere to have that kind of cash on hand.