- First thing that will get you some extra RP is go to singleplayer and turn your aiming to "Free Aim".
- Then go online and choose any mission you wish to do (Preferable Rooftop Rumble) Turn it to hard and do the mission.
- Right when you are about to complete the mission, wait about 3 - 5 minutes. (Just go AFK for a few minutes).
- After you AFKed for a while, complete the mission.
You should get more RP than usual. I did a comparison:
Potshot w/o AFK: 1900 RP - $8000
Potshot w/ AFK: 2700 RP $13500
Rooftop Rumble w/o AFK: 2200 RP - $13000
Rooftop Rumble w/ AFK: 3800 RP - $22000
Hope this helped!