Nisus shows himself willing to sacrifice his own honor in order to help Euryalus, but the gesture demonstrates not only his loyalty but a willingness to cheat. Salius objects to the foul, and is given a consolation prize. Nisus receives compensation for his bad luck, and Euryalus gets the winner's prize.
Nisus is prepared to sacrifice his own honor to assist Euryalus, which highlights both his loyalty and willingness to cheat. Salius protests the injustice and receives a consolation award. Nisus is compensated for his bad luck, whereas Euryalus secures the victory prize.