They're not. Like all clubs, they will spend the odd year in the red (on purpose) and some years in the green.
They are acquiring record commercial success at the club, never mind on field success, too.
The Sox don't need to give them a penny, even if it was allowed to use that money, which they wouldn't be. Premier League football clubs have to exist in the parameters of their own turnover.
Which is why Newcastle can't just buy the Premier League every year.