I have often wondered about this. When I've logged onto Viva street links that have been posted and that particular advert is nowhere to be seen.
Usually it happens when the girl tours a lot. Once they leave a certain area, they simply deactivate that ad and when they arrive in their new place they will reactivate the ad with updated location etc. I hope this helps.
they expire after 30 days unless renewed, by then the girls have usually either moved on or created a new profile anywayIt's why trying to index VS reviews is a waste of time