The link you show indicates that there are many lower cost airlines in the bottom ranking scores.
In addition - can you explain why the rumour info that I have is that Jestar in Australia has not undergone an IOSA audit?
One of many... but if you don't know how to use Google, I can't help you.
Dude - there is no need to get like that. We are not children. I am trying to have a reasoned discussion.