Lots of people have suggested how having buffs, earned through activity, would make players value their lives more. E.g. the more wood you chop, the quicker you chop. The more you shoot, the more accurate you are. The more you run, the faster you are. But if you die, you lose it all and back to square 1.
With the hint that handcuffing and capturing prisoners is coming (cage on a truck), I couldn’t see any point in it. Someone captures you, you just suicide. But they can’t take away the suicide option as this would mean your whole time on a server could be ended by being captured and stuck in a box = no fun, everyone leaves the server.
However, if you have buffs, then you have a reason not to suicide- and this could lead to ransom situations. So if you get captured, your buddies can arrange prisoner swap or ransom. If I have been alive a week and have gained lots of skill, my buddies will pay 10k metal to get me back.