Cpt. Underpants, Cathay does not care if you pruchase a rating yourself or not. I know, personally, several blokes who are still with CX that have purchased types AND line experience in the past. Given, it was not to join CX, it was for a previos carrier.
Laury, though the Captains" personal views towards so called "PFT" and Cathay recruitment are incorrect, his overall view is correct. Buying a Bus or Boeing rating will not help you at very many Eastern carriers, unless you have significant time on type.
Your best bet is to keep on building your experience, while getting paid to do it.