Here is one benefit.. they are eligible for the US International Student Loan Program
Social Security Numbers and International Student Loans
Many international students who choose to study in the United States will look into obtaining student loans to help fund their studies. If this is the case with you, you may find that some lenders require that you have a Social Security Number (SSN) in order to apply (and other lenders may not). SSNs are assigned to people who are authorized to work in the United States, and are used to report your wages to the government and to determine eligibility for Social Security benefits.
Per the SSA
The Social Security Protection Act of 2004 (P.L. 108-203) requires an alien whose application for benefits is based on an SSN assigned January 1, 2004, or later to have work authorization at the time an SSN is assigned, or at some later time, to gain insured status under the Social Security program.
Aliens whose applications are based on SSNs assigned before January 1, 2004, may count all covered earnings toward insured status, regardless of work authorization. The Social Security Act also prohibits the payment of benefits to aliens in the United States who are not “lawfully present”; however, under certain circumstances, alien workers as well as their dependents and survivors may receive benefits while residing outside the United States (including benefits based on unauthorized work).