And yes they did exploit her because she wanted to leave and they told her she had to stay and tell her story.
You cannot exploit someone that has given their consent. Re-watch her eviction interview - several things are confirmed:
• She gave consent to them airing her Diary Room comments.
• She gave consent to them airing her discussing it with her housemates.
• She gave consent to them showing the footage and discussing during the eviction before being evicted (in case she did leave).
• She gave consent to them again on-stage to show the footage and discuss it during the eviction - Gretel outright asked her before going into the subject in case she changed her mind.
It's not worth getting into this given that the topic is 11 years old, but my point is she's not the innocent victim she is painting herself as that had her story shared with Australia when she didn't want it to be. She's stupid to try playing that card.