If you pass any restaurant these days you'll almost certainly see a sign like this one:
"Now hiring: $________ sign-on bonus."
I've seen that blank filled in with numbers as high a $1,000 to work at a fast-food restaurant.
Employers are paying these bonuses because they continue to struggle to fill job vacancies in the tightest and toughest labor market I've ever witnessed.
If you find yourself in this position, do not forget about the wage and hour implications of these bonus payments, specifically their inclusion in the "regular rate" for purposes of calculating an employee's overtime premium.