Ah, most of those Gold VIPs are not available to the general public, but to sponsors, magazine photogs, ex-bodybuilders and their families. No suprise here.
Most of the Gold VIPs are available to anyone who buys them year after year. Just like many theaters and season ticket holders, if you purchased last year, you are entitled to purchase them this year, and get better seats. If someone who purchased one last year declines, then someone else gets a better seat. Hence, they sell out because of the major demand for these VIP tickets.
Magazine photogs, ex-bodybuilders, etc are assigned seats, which are different.