Hi, fresh (read: new) perspective on this here from a new player who just pledged to Winters yesterday...
I spent 15 minutes trying to understand PP as much as I could (because who wants to spend more than 15 mins reading stuff during their "gaming time" window). Once I thought I got my head around it I flew to Rhea. Then grabbed some Liberal Flyer thingos, then checked where I could send them... #1 on the list? Barathaona.
"Righto, that must be the place everyone is pushing on because it's #1. Oh look, it's also relatively close to Rhea too so I can do a bunch of drops and increase my rep and start earning a tasty CR salary. Excellent!"
I did two trips (10 each) with the Liberal Flyer because it was close and I was earning rep with Winters. In my (beginner) mind, it was win/win.
Have you considered that maybe there
ISN'T an evil group of dissidents inside the Winters camp, trying to stuff things up and INSTEAD, there are a bunch of freshly-minted CMDR's (from maybe hmm, the consoles?) that are doing runs from Rhea to Barataona purely because of the same circumstances I just outlined in my first foray into PP?
And the reason you're not seeing them is because they are on another platform, or like me, are so fresh they are still learning the game whilst in Private Group mode with a couple of mates.
You can't blame them really. The game is ridiculously unhelpful at teaching players about PP and then there is zero information on which systems to choose based on what you're faction is doing (apart from a 1-10 system ranking that is obviously HIGHLY prone to human error, thus being useless).