IMO, this is incredibly generous! 30% discount on up to one third of your loan balance!
So effectively you get up to 10% (30% x 1/3) wiped off your entire loan balance if you repay in the next 2 weeks!
ELF'ers, I hope you're all getting ready to put your money to good use!!!
Disclosure: I converted all my options up front and did not make use of the ELF.