Quick follow-up from the previous post.
I was able to finish the Sansha Owned Station expedition. It was the first time that one escalated all the way for me. Oddly enough, the last site of the escalation was in lowsec not nullsec. It didn’t drop much, just an A-type Kinetic membrane worth about 40M isk. The second to last site was actually better, it dropped a True Sansha Stasis Web worth about 180M isk. Total haul for the minor annex and escalation was about 450M isk.
I made some notes on it and will eventually make a guide about it.