I'd like to think I'm one of the original 20 people who unlocked it. Took a bit but everything fell into place and the quest beacon for the ship was quite far from the exit. But I trucked on and got it... then high-tailed it, miraculously avoiding the fleet when I went back a node or two.
Then when I got FTL for the iPad, I played it normally until I got the Rock cruiser. My first playthrough with the Bulwark, I managed to get the pod, unlock it and then go to the Crystal Homeworlds. First run, Ancestry. Never got it again in any of the Rock ships