Salary caps are more about keeping smaller clubs competitive. Is it really the case here? I think if this guy's company was acquired for $1B and he made $250M from the sale, people wouldn't be surprised at all.
You must not follow sports very close. Every time a young supports signs his first big deal, people freak out and compare it to the last superstar's deal. "Young players getting too much money before they earned it" is a trope at this point.