The only explanation for her posting that on her story was to boast about how much she can afford to spend on rent (she basically lives at Sam’s anyway so I don’t understand why she even rented somewhere). I highly doubt she will receive any commission or a bonus from the estate agents if one of her followers decides to rent it, so I don’t get why she is trying to advertise it. I’m sure if one of her followers wanted somewhere to rent then they would have looked on Right Move before checking Zara’s stories
Her lease has ended hence the availability date of the apartment being “ASAP”, so it’s also not like she needs to find someone to take over her tenancy to come out of her contract early. She also wouldn’t have posted it with the full address if she was still living there