I don't think he means (I hope!) hide from the IRS. But perhaps he means hiding profit from the Red Sox in some other part of Fenway's portfolio. (like Liverpool FC or whatever other entities the hold company owns)
Now, in terms of the relevant point (getting more money to players and avoiding a strike in 2021), like the NBA or NFL, the players and teams have to come up with an auditable, mutually agreed on definition of "revenue" for determining what should be spent on major league players. I agree with skepticism of, say, Forbes' evaluation of team revenue, that it is possible that some of Steinbrenner's revenue from the Yankees might be reported on another one of his holdings. But that means that the players share might be even lower than the 44% I could calculate. Management needs to get ahead of this, because two more offseasons like this will not be good for player-owner relations (and thus, the probability of us watching people play major league baseball)0.