Wow been probably 5+ years since I got a pickup but got it today in SEA for just over an hour connection when inbound was a few min early. Went from S gates to B gates and drop off was in the SC.
Still would love to understand the “random” algorithm on what medallions and what tight connections meet the criteria. The driver confirmed it’s mostly DM and 360s, but I can only imagine it’s because I started flying Delta recently after spending too much time with UA.

Or could it be that they felt so bad I have to fly a 738???
Also makes me wonder what if the DM/PM gets a transfer in SEA but isn’t a SC member. Is there a different transfer location?