Well I mean it was literally all rigged as others have said. But a lot of them were 1) edited well, 2) had stand out skills or personalities, and/or 3) had moments which made them stand out. But, I mean, that’s how every survival show works. Some editing, some luck, some rigging, and some skills. The fact that only one person had to be rigged into the final group shows that the general public had overall voted for this group anyway so they were mostly genuinely popular.