Actually, 8 is a good time to reveal you have the Individual Immunity idol. As The Controvert said, the best use of it is not to use it at all.
Say there are 9 people left. Everyone knows you have the idol. 7 of them decide they want to get rid of the idol. 4 of them vote against you, 3 of them against the other lonely sap who didn’t go to the meeting. Your vote and other lonely sap’s votes don’t matter at that point - Jeff tells you you’re going home, you pull out the idol and lose it, other sap goes home. This is ironclad - there’s no uncertainty for the alliance against you, apart from trusting that everyone will do their part.
At 7 left, that doesn’t work anymore. 5 decide to get rid of the idol. 3 vote for you, 2 for the sap, but you and the sap vote for one of the 5. You pull out the idol, and it’s now a tie between the sap and one of the 5, and those 2 are left trying to set each other on fire or whatever. That’s a lot of uncertainty for the 5 to deal with.
At 8 left, it depends on the rules. 6 decide to get rid of the idol. They can do 4 for you, 2 for the sap, and risk that you and the sap vote together against one of them, leading to the above scenario. Or, they can do 3 for you, 3 for the sap. In that case, it depends on whether you need to pull out the idol then, or if you can do the tiebreaker challenge. If they let you do that, and you win, you still have the idol and we’re down to the 7 person tribe. If you lose, you can still pull out the idol and send the sap home.
So 9 or more left is the only time a group can band together and get rid of the idol with absolutely no risk to any of themselves. Once you’re past that point, uncertainty creeps in, and it’s better to let everyone know that you have the idol, so no opposing alliance can get rid of the idol without risking one of their own.
rockle, did you notice Jeff called Ozzy “Dolphin boy” when he bid for the ice cream?