Hi FT, casual lurker. Quick question about a free op-up i've had recently.

Cathay Dragon Flight from HKG to XMN. Flight was delayed thrice. (About 3 hours total from intended departure). I recently signed up for MPC and started off with green. Got an Economy ticket from a booking agent (Category S?)

I usually travel on discounted economy tickets through the likes of Skyscanner booking sites. On this occasion, while queuing up in the MPC green lane for boarding, I was given a ticket which shows cat J and told that it was a 'first class' seat all the way at the front row. (Im a pretty frequent low-budget traveller so you can only imagine the s***-eating grin of delight at the op-up)

Anyone able to shed any light on how I was eligible? As I read, my status should be pretty low on the priority list for op-ups.

Cheers