Quoted from Aurich:
After you finish a CIU it lights all the shots, if you have a Prem/LE they're lit orange. Like a victory lap deal. I forget though what happens if you make them all, I can't remember if I've actually done it or not.
Hit each shot to un-light that insert, and once all 6 are out the CIU will relight. Hit the Mystery scoop to be awarded ~25% of your CIU jackpot value. i.e. 40mil CIU jackpot = 10mil collect. Rinse and repeat until you lose that ball. Not sure if there is a limit on how many times you can collect.