Hell, heres my ideas.

-> for every 1,000 pk points a gang gets, the leader can select either one of two things:
--> when the gang owns the base, members can heal at a rate of 1 hp per second when within a radius of the safe, the rate of healing increases per 1,000 pk points. This bonus wears off when the gang loses the base or loses its 1,000 pk points.

--> the gangs members get a +10% profit bonus to all sellables they sell while they have the 1,000 pk points.

These benefits would only work while the player has the gang tag on.
Example: if im in lapse and since were awesome we get 1,000 pk points, id need to keep my lapse tag on to have the benefit be in effect.