I thought I heard a cast member tell someone that you can get VIP by doing a park tour as well.
Other people may be offered the VIP section, at the discretion of the lead and the person running the VIP section.
There are also other circumstances that lead to them offering the VIP section.
It has been given to us once, due to some issues with how ADA viewing was handled about a year ago.
A lead gave it to my Uncle (without him asking), because he mentioned that he played (along with his Twin Brother) Little Ricky on I Love Lucy when they were kids.
We almost ended up there with the Carthay Circle FPs, because we can't stand for long periods of time and there were no benches left. They ended up finding room in a better spot though.
So, there are circumstances that the VIP section is used for, but I think they should open it up at say 5 minutes before the show starts to anyone.