Same chance as getting a signing bonus or company car or them paying extra for a recruitment agency I'd say. For a company it's an expense just taxed differently. I once got such a package consisting of immigration lawyer + flight cost + rental car one month + furnished appartment one month + shipping my stuff, about 12.000 USD total. The HR department called it package and all was organized by a separate company specialized in that. At least the big companies deal with this multiple times per year if not per month.