Probably it's just sour grapes on my part - but my theory is that given the package is amongst the worst in the world for flying similar types, Vista prefer non-rated applicants that they can bond rather than rated guys who are treading water till something better comes up (I know 2 of their guys in this position) to save wasting money on OPCs / Sim / general training costs.
But then I'm cynical like that 😝
The package on PPJN is accurate I'm told.