Whenever someone refunds from a rental, I send them a note and ask them if they had any problems. Sometimes they refund because they can't solve a problem like terraforming or they didn't realize they had to join the group to put out objects, or a neighbour was bothering them, and I can fix it for them and they can say.
But sometimes, there are those necessary partings that occur in Second Life, and you have to let them go. A note I received this evening:
this night i left that parcel, because now im married with a vampire and live on their castle. Thanks very much for you, your land is very beautiful and i was very happy there. Bye for now Prokofy
I know another happy married couple with even a vampire baby who were in my rentals. I do have land to fit castles -- but perhaps not as big as this beloved's. Ah, well, stay as sweet as you are!