A little over 3 years ago, when there were almost 200 pilots with families living in temporary (2 bedroom apartments) accommodation, there was a one off payment of 100k in addition to the allowance to encourage people to find their own places. Those who took up the offer were also allowed to re-enter company accommodation after the first year.
As far as I know, there is no current "bonus" (one-off payment) for people leaving company villas.