It's pretty clear that to get into the big money private games one has to know someone and be reasonably sociable. A few years ago I caught an interview with Antonio Esfandiari. He and Phil Laak, two very entertaining players were flying from city to city, going from one high stakes private game to another. Someone obviously saw some value in their attendance.
Compare this to the former WSOP
main event winner who flew to Macau, only to find that he couldn't get into the big games. BTW, this same player once publicly complained about not being able to get into the big games at Aria.
What it comes down to is this, big money donators have to see some value in a pro player before allowing one in their game. They have a right to decide to whom they are going to lose their money. If this is something you aspire to, work on your social and networking skills.