Ozzy getting voted out had NOTHING to do with anyone keeping their promise to Jason! None of the other contestants cared about the "promise". Voting Ozzy out was done to get Ozzy out. Period. NOBODY but Jason cares about Jason or the promise.

By the way, everyone will blame Parvarti for Ozzy's ousting since she had the closest relationship with Ozzy and betrayed him, but it was Ceire who craftily calculated that THIS is the moment to get rid of Ozzy without having to deal with the effects of the immunity idol. If they didn't get him this week then they were going to have to vote him out twice... once to flush out the idol and a second time to actually get him off the island.