Curate, connect, and discover
In Arkham they don't allow outside media in fear of the rouges getting any ideas. This leads to them treating the staff like their own personal TV show, this leads to a level of parasocial obsession that can often be detrimental (See Harley Quinn as a notable example). So when DR. Jazz Fenton comes in with subtle hinting of government conspiracies and a 'i've seen worse' attitude they are INVESTED. Meany of them are staying just for the show, their plans can wait they NEED to know this woman's backstory.
"hey it's been awfully quiet"
"Yeah, new hire at Arkham, it happens sometimes"
*3 months later*
"sooo"
"yeah something's definitely up"