People, meet the Silna brothers, Ozzie & Daniel. Last year they received $19 million from the NBA, and have in sum received a total of around $300 million from the Association.
They don't play on any team, or coach, or have a concession contract, or run a medical facility. No, they are the ex-owners of the Spirits of St. Louis, a long defunct ABA franchise.
When the ABA went under in 1976 and was partially absorbed by the NBA, the Spirits were left out in the cold. But the Silnas negotiated a settlement of a smallish lump sum payment plus 1/7th of the "visual media" revenues generated by the 4 ABA teams who made it into the NBA (Spurs, Nets, Nuggets, Pacers) IN PERPETUITY.
In 1982, the NBA had a chance to buy them out of the deal for $8 million paid out over 8 years but refused!
And, just this year, a judge ruled that the NBA has to pay them a share of the League's internet and NBA TV revenues as well.
Here is a great article about the situation. And here is a NYTimes article about it.