in the unstable iso-8 event, you can play missions 12 TIMES instead of 6, you dont get extra points, but you do get double awards, i might just play the 5E 12 times just for the extra command points lol.
If you do double the nodes and you get double rewards it’s not really an exploit imo. But i’m gonna pass. I already have an alt account, so I’m always doing double the nodes 
exploiting something means taking advantage of something that wasnt meant to be, like getting 4cp instead of 2 for the 5E, but i see your POV as well.
Was a little surprised to originally see the 12 rewards but when i checked again later the 12 is now back to 6, wonder if this was some sort of ‘test’ of a new feature?
Also showing i have received 2 of 6 rewards even though did the mission 4 times → timer is still in countdown mode & does show 4 rewards yet to be claimed.