Lots of top level guys say it: Sometimes, it's about getting paid.
That being said, this is a niche sport. You want to get paid to do what you love, it is its own kind of hustle. No one is entitled to make a living from a niche sport. There's a business side to it and typically the skills necessary to be a world champion are not the same ones to be a wealthy, successful business owner.
In fact, they can often be a detriment.
That being said, the IBJJF is hearing the noise and is offering another venue for upper belts to make some cash doing what they love.
Information HERE over at Graciemag:
"Note: All adult black belts, male and female, will need to have at least 20 points in the IBJJF ranking system to qualify for competition....
The prizes are listed as follows:
Black belt adult male weight divisions: $4,000 for gold, $1,000 for silver
Black belt female absolute: $1,500 for gold
Master 1, 2, 3 black belt male: $1,000 for gold
Each brown belt male absolute (2): $800 for gold
Each purple belt male absolute (2): $600 for gold
Each blue belt male absolute (2): $400 for gold
Master 1, 2, 3 male blue, purple, brown belt absolute: $400 for gold
Adult female blue, purple, brown belt absolute: $400 for gold
Note: All athletes must place in their weight divisions to be eligible for open class except for adult female black belts.
To register, head to www.ibjjf.org. Registration period ends on Oct. 17!"