There's no such thing as inactivity there's only "making it interesting" or "making it ok".
With a good presentation, 100-200mil poured in the project and some hired guns, you can make most of unlawful factions prosper. You need a friend, possibly two and you're good to go.
PvP is far from your goal here.
People need to have it fun on few fronts. Piracy, extortion, gunning down whatever presents itself as a threat. Take some of the money you earn from your private sources, or your trading character and pour it into a shared pirate transport or a smaller freighter.
Three smaller freighters cost around 20million, I'm sure everyone can provide another 15 for their freighter's armour and I don't think Rheinland ever had issues with guns.
thats roughly around 1300 cargo space there. You can either smuggle, or pirate or do both, depends on how do you want to do it.
I believe people want to play where the action is.
If you make people realize that action is where you are, they'll come to you.